diff --git a/core/include/fxcrt/fx_system.h b/core/include/fxcrt/fx_system.h
index 4eb217a..920c821 100644
--- a/core/include/fxcrt/fx_system.h
+++ b/core/include/fxcrt/fx_system.h
@@ -269,7 +269,6 @@
 int64_t FXSYS_wtoi64(const FX_WCHAR* str);
 const FX_CHAR* FXSYS_i64toa(int64_t value, FX_CHAR* str, int radix);
 int FXSYS_round(FX_FLOAT f);
-#define FXSYS_Div(a, b) ((a) / (b))
 #define FXSYS_MulDiv(a, b, c) ((a) * (b) / (c))
 #define FXSYS_sqrt2(a, b) (FX_FLOAT) FXSYS_sqrt((a) * (a) + (b) * (b))
 #ifdef __cplusplus
diff --git a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
index 81cf92e..d589d58 100644
--- a/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
+++ b/core/src/fpdfapi/fpdf_page/fpdf_page.cpp
@@ -752,11 +752,10 @@
       y2 = yPos;
       break;
   }
-  display_matrix.Set(FXSYS_Div((FX_FLOAT)(x2 - x0), m_PageWidth),
-                     FXSYS_Div((FX_FLOAT)(y2 - y0), m_PageWidth),
-                     FXSYS_Div((FX_FLOAT)(x1 - x0), m_PageHeight),
-                     FXSYS_Div((FX_FLOAT)(y1 - y0), m_PageHeight), (FX_FLOAT)x0,
-                     (FX_FLOAT)y0);
+  display_matrix.Set(
+      ((FX_FLOAT)(x2 - x0)) / m_PageWidth, ((FX_FLOAT)(y2 - y0)) / m_PageWidth,
+      ((FX_FLOAT)(x1 - x0)) / m_PageHeight,
+      ((FX_FLOAT)(y1 - y0)) / m_PageHeight, (FX_FLOAT)x0, (FX_FLOAT)y0);
   matrix = m_PageMatrix;
   matrix.Concat(display_matrix);
 }
diff --git a/core/src/fpdfapi/fpdf_render/fpdf_render_pattern.cpp b/core/src/fpdfapi/fpdf_render/fpdf_render_pattern.cpp
index b9ff9f4..43ce995 100644
--- a/core/src/fpdfapi/fpdf_render/fpdf_render_pattern.cpp
+++ b/core/src/fpdfapi/fpdf_render/fpdf_render_pattern.cpp
@@ -83,8 +83,8 @@
     for (int column = 0; column < width; column++) {
       FX_FLOAT x = (FX_FLOAT)column, y = (FX_FLOAT)row;
       matrix.Transform(x, y);
-      FX_FLOAT scale = FXSYS_Div(
-          ((x - start_x) * x_span) + ((y - start_y) * y_span), axis_len_square);
+      FX_FLOAT scale = (((x - start_x) * x_span) + ((y - start_y) * y_span)) /
+                       axis_len_square;
       int index = (int32_t)(scale * (SHADING_STEPS - 1));
       if (index < 0) {
         if (!bStartExtend) {
@@ -189,7 +189,7 @@
                    ((y - start_y) * (y - start_y)) - (start_r * start_r);
       FX_FLOAT s;
       if (a == 0) {
-        s = FXSYS_Div(-c, b);
+        s = -c / b;
       } else {
         FX_FLOAT b2_4ac = (b * b) - 4 * (a * c);
         if (b2_4ac < 0) {
@@ -198,11 +198,11 @@
         FX_FLOAT root = FXSYS_sqrt(b2_4ac);
         FX_FLOAT s1, s2;
         if (a > 0) {
-          s1 = FXSYS_Div(-b - root, 2 * a);
-          s2 = FXSYS_Div(-b + root, 2 * a);
+          s1 = (-b - root) / (2 * a);
+          s2 = (-b + root) / (2 * a);
         } else {
-          s2 = FXSYS_Div(-b - root, 2 * a);
-          s1 = FXSYS_Div(-b + root, 2 * a);
+          s2 = (-b - root) / (2 * a);
+          s1 = (-b + root) / (2 * a);
         }
         if (bDecreasing) {
           if (s1 >= 0 || bStartExtend) {
@@ -1044,14 +1044,16 @@
   mtDevice2Pattern.SetReverse(mtPattern2Device);
   CFX_FloatRect clip_box_p(clip_box);
   clip_box_p.Transform(&mtDevice2Pattern);
-  min_col = (int)FXSYS_ceil(
-      FXSYS_Div(clip_box_p.left - pPattern->m_BBox.right, pPattern->m_XStep));
-  max_col = (int)FXSYS_floor(
-      FXSYS_Div(clip_box_p.right - pPattern->m_BBox.left, pPattern->m_XStep));
-  min_row = (int)FXSYS_ceil(
-      FXSYS_Div(clip_box_p.bottom - pPattern->m_BBox.top, pPattern->m_YStep));
-  max_row = (int)FXSYS_floor(
-      FXSYS_Div(clip_box_p.top - pPattern->m_BBox.bottom, pPattern->m_YStep));
+
+  min_col = (int)FXSYS_ceil((clip_box_p.left - pPattern->m_BBox.right) /
+                            pPattern->m_XStep);
+  max_col = (int)FXSYS_floor((clip_box_p.right - pPattern->m_BBox.left) /
+                             pPattern->m_XStep);
+  min_row = (int)FXSYS_ceil((clip_box_p.bottom - pPattern->m_BBox.top) /
+                            pPattern->m_YStep);
+  max_row = (int)FXSYS_floor((clip_box_p.top - pPattern->m_BBox.bottom) /
+                             pPattern->m_YStep);
+
   if (width > clip_box.Width() || height > clip_box.Height() ||
       width * height > clip_box.Width() * clip_box.Height()) {
     CPDF_GraphicStates* pStates = NULL;
diff --git a/core/src/fxcodec/codec/fx_codec_progress.cpp b/core/src/fxcodec/codec/fx_codec_progress.cpp
index 2e9b1dc..1b46c4e 100644
--- a/core/src/fxcodec/codec/fx_codec_progress.cpp
+++ b/core/src/fxcodec/codec/fx_codec_progress.cpp
@@ -18,7 +18,7 @@
     FX_Free(m_pWeightTables);
   }
   double scale, base;
-  scale = FXSYS_Div((FX_FLOAT)(src_len), (FX_FLOAT)(dest_len));
+  scale = (FX_FLOAT)src_len / (FX_FLOAT)dest_len;
   if (dest_len < 0) {
     base = (FX_FLOAT)(src_len);
   } else {
@@ -88,8 +88,8 @@
     pixel_weights.m_SrcStart = start_i;
     pixel_weights.m_SrcEnd = end_i;
     for (int j = start_i; j <= end_i; j++) {
-      double dest_start = FXSYS_Div((FX_FLOAT)(j)-base, scale);
-      double dest_end = FXSYS_Div((FX_FLOAT)(j + 1) - base, scale);
+      double dest_start = ((FX_FLOAT)j - base) / scale;
+      double dest_end = ((FX_FLOAT)(j + 1) - base) / scale;
       if (dest_start > dest_end) {
         double temp = dest_start;
         dest_start = dest_end;
diff --git a/core/src/fxge/agg/src/fx_agg_driver.cpp b/core/src/fxge/agg/src/fx_agg_driver.cpp
index 5006254..8b0e3f9 100644
--- a/core/src/fxge/agg/src/fx_agg_driver.cpp
+++ b/core/src/fxge/agg/src/fx_agg_driver.cpp
@@ -144,8 +144,8 @@
   FX_FLOAT width = pGraphState->m_LineWidth * scale;
   FX_FLOAT unit = 1.f;
   if (pObject2Device) {
-    unit = FXSYS_Div(
-        1.0f, (pObject2Device->GetXUnit() + pObject2Device->GetYUnit()) / 2);
+    unit =
+        1.0f / ((pObject2Device->GetXUnit() + pObject2Device->GetYUnit()) / 2);
   }
   if (width < unit) {
     width = unit;
diff --git a/core/src/fxge/dib/fx_dib_engine.cpp b/core/src/fxge/dib/fx_dib_engine.cpp
index 47fca79..3220405 100644
--- a/core/src/fxge/dib/fx_dib_engine.cpp
+++ b/core/src/fxge/dib/fx_dib_engine.cpp
@@ -20,7 +20,7 @@
   FX_Free(m_pWeightTables);
   m_pWeightTables = NULL;
   double scale, base;
-  scale = FXSYS_Div((FX_FLOAT)(src_len), (FX_FLOAT)(dest_len));
+  scale = (FX_FLOAT)src_len / (FX_FLOAT)dest_len;
   if (dest_len < 0) {
     base = (FX_FLOAT)(src_len);
   } else {
@@ -188,8 +188,8 @@
     pixel_weights.m_SrcStart = start_i;
     pixel_weights.m_SrcEnd = end_i;
     for (int j = start_i; j <= end_i; j++) {
-      double dest_start = FXSYS_Div((FX_FLOAT)(j)-base, scale);
-      double dest_end = FXSYS_Div((FX_FLOAT)(j + 1) - base, scale);
+      double dest_start = ((FX_FLOAT)j - base) / scale;
+      double dest_end = ((FX_FLOAT)(j + 1) - base) / scale;
       if (dest_start > dest_end) {
         double temp = dest_start;
         dest_start = dest_end;
@@ -270,8 +270,8 @@
       m_Flags |= FXDIB_DOWNSAMPLE;
     }
   }
-  double scale_x = FXSYS_Div((FX_FLOAT)(m_SrcWidth), (FX_FLOAT)(m_DestWidth));
-  double scale_y = FXSYS_Div((FX_FLOAT)(m_SrcHeight), (FX_FLOAT)(m_DestHeight));
+  double scale_x = (FX_FLOAT)m_SrcWidth / (FX_FLOAT)m_DestWidth;
+  double scale_y = (FX_FLOAT)m_SrcHeight / (FX_FLOAT)m_DestHeight;
   double base_x = m_DestWidth > 0 ? 0.0f : (FX_FLOAT)(m_DestWidth);
   double base_y = m_DestHeight > 0 ? 0.0f : (FX_FLOAT)(m_DestHeight);
   double src_left = scale_x * ((FX_FLOAT)(clip_rect.left) + base_x);
diff --git a/core/src/fxge/ge/fx_ge_path.cpp b/core/src/fxge/ge/fx_ge_path.cpp
index 0084f09..0c24c0f 100644
--- a/core/src/fxge/ge/fx_ge_path.cpp
+++ b/core/src/fxge/ge/fx_ge_path.cpp
@@ -263,14 +263,14 @@
     return;
   }
   if (!bStartVert) {
-    start_k = FXSYS_Div(middle_y - start_y, middle_x - start_x);
+    start_k = (middle_y - start_y) / (middle_x - start_x);
     start_c = middle_y - (start_k * middle_x);
     start_len = FXSYS_sqrt2(start_x - middle_x, start_y - middle_y);
     start_dc = (FX_FLOAT)FXSYS_fabs(
         FXSYS_MulDiv(half_width, start_len, start_x - middle_x));
   }
   if (!bEndVert) {
-    end_k = FXSYS_Div(end_y - middle_y, end_x - middle_x);
+    end_k = (end_y - middle_y) / (end_x - middle_x);
     end_c = middle_y - (end_k * middle_x);
     end_len = FXSYS_sqrt2(end_x - middle_x, end_y - middle_y);
     end_dc = (FX_FLOAT)FXSYS_fabs(
@@ -331,7 +331,7 @@
   } else {
     end_outside_c -= end_dc;
   }
-  FX_FLOAT join_x = FXSYS_Div(end_outside_c - start_outside_c, start_k - end_k);
+  FX_FLOAT join_x = (end_outside_c - start_outside_c) / (start_k - end_k);
   FX_FLOAT join_y = (start_k * join_x) + start_outside_c;
   rect.UpdateRect(join_x, join_y);
 }
diff --git a/core/src/fxge/win32/fx_win32_gdipext.cpp b/core/src/fxge/win32/fx_win32_gdipext.cpp
index ce28094..e71d94d 100644
--- a/core/src/fxge/win32/fx_win32_gdipext.cpp
+++ b/core/src/fxge/win32/fx_win32_gdipext.cpp
@@ -973,9 +973,8 @@
   FX_FLOAT width = pGraphState ? pGraphState->m_LineWidth : 1.0f;
   if (!bTextMode) {
     FX_FLOAT unit =
-        pMatrix
-            ? FXSYS_Div(1.0f, (pMatrix->GetXUnit() + pMatrix->GetYUnit()) / 2)
-            : 1.0f;
+        pMatrix ? 1.0f / ((pMatrix->GetXUnit() + pMatrix->GetYUnit()) / 2)
+                : 1.0f;
     if (width < unit) {
       width = unit;
     }
diff --git a/core/src/fxge/win32/fx_win32_print.cpp b/core/src/fxge/win32/fx_win32_print.cpp
index 4816c03..6c262d8 100644
--- a/core/src/fxge/win32/fx_win32_print.cpp
+++ b/core/src/fxge/win32/fx_win32_print.cpp
@@ -149,8 +149,7 @@
   uint8_t* src_buf = pSrcBitmap->GetBuffer();
   FX_DWORD src_pitch = pSrcBitmap->GetPitch();
   FX_FLOAT dest_area = pDestMatrix->GetUnitArea();
-  FX_FLOAT area_scale =
-      FXSYS_Div((FX_FLOAT)(src_width * src_height), dest_area);
+  FX_FLOAT area_scale = ((FX_FLOAT)(src_width * src_height)) / dest_area;
   FX_FLOAT size_scale = FXSYS_sqrt(area_scale);
   CFX_Matrix adjusted_matrix(*pDestMatrix);
   adjusted_matrix.Scale(size_scale, size_scale);
diff --git a/third_party/agg23/agg_clip_liang_barsky.h b/third_party/agg23/agg_clip_liang_barsky.h
index 13e4ab9..db6ca97 100644
--- a/third_party/agg23/agg_clip_liang_barsky.h
+++ b/third_party/agg23/agg_clip_liang_barsky.h
@@ -50,7 +50,7 @@
         xin  = (FX_FLOAT)clip_box.x2;
         xout = (FX_FLOAT)clip_box.x1;
     }
-    FX_FLOAT tinx = FXSYS_Div(xin - x1, deltax);
+    FX_FLOAT tinx = (xin - x1) / deltax;
     if(deltay == 0) {
         deltay = (y1 > clip_box.y1) ? -nearzero : nearzero;
     }
@@ -62,7 +62,7 @@
         yin  = (FX_FLOAT)clip_box.y2;
         yout = (FX_FLOAT)clip_box.y1;
     }
-    FX_FLOAT tiny = FXSYS_Div(yin - y1, deltay);
+    FX_FLOAT tiny = (yin - y1) / deltay;
     FX_FLOAT tin1, tin2;
     if (tinx < tiny) {
         tin1 = tinx;
@@ -78,10 +78,10 @@
             ++np;
         }
         if(tin2 <= 1.0f) {
-            FX_FLOAT toutx = FXSYS_Div(xout - x1, deltax);
-            FX_FLOAT touty = FXSYS_Div(yout - y1, deltay);
-            FX_FLOAT tout1 = (toutx < touty) ? toutx : touty;
-            if(tin2 > 0 || tout1 > 0) {
+          FX_FLOAT toutx = (xout - x1) / deltax;
+          FX_FLOAT touty = (yout - y1) / deltay;
+          FX_FLOAT tout1 = (toutx < touty) ? toutx : touty;
+          if (tin2 > 0 || tout1 > 0) {
                 if(tin2 <= tout1) {
                     if(tin2 > 0) {
                         if(tinx > tiny) {
@@ -116,7 +116,7 @@
                     }
                     ++np;
                 }
-            }
+          }
         }
     }
     return np;
diff --git a/third_party/agg23/agg_math_stroke.h b/third_party/agg23/agg_math_stroke.h
index ff42b22..402028b 100644
--- a/third_party/agg23/agg_math_stroke.h
+++ b/third_party/agg23/agg_math_stroke.h
@@ -58,7 +58,7 @@
     if(width < 0) {
         width = -width;
     }
-    da = FXSYS_acos(FXSYS_Div(width, width + FXSYS_Div(1.0f / 8, approximation_scale))) * 2;
+    da = FXSYS_acos(width / (width + ((1.0f / 8) / approximation_scale))) * 2;
     out_vertices.add(coord_type(x + dx1, y + dy1));
     if(!ccw) {
         if(a1 > a2) {
@@ -152,8 +152,8 @@
 {
     typedef typename VertexConsumer::value_type coord_type;
     out_vertices.remove_all();
-    FX_FLOAT dx1 = FXSYS_Div(v1.y - v0.y, len);
-    FX_FLOAT dy1 = FXSYS_Div(v1.x - v0.x, len);
+    FX_FLOAT dx1 = (v1.y - v0.y) / len;
+    FX_FLOAT dy1 = (v1.x - v0.x) / len;
     FX_FLOAT dx2 = 0;
     FX_FLOAT dy2 = 0;
     dx1 = dx1 * width;
@@ -168,8 +168,9 @@
     } else {
         FX_FLOAT a1 = FXSYS_atan2(dy1, -dx1);
         FX_FLOAT a2 = a1 + FX_PI;
-        FX_FLOAT da = FXSYS_acos(FXSYS_Div(width, width +
-                                           FXSYS_Div(1.0f / 8, approximation_scale))) * 2;
+        FX_FLOAT da =
+            FXSYS_acos(width / (width + ((1.0f / 8) / approximation_scale))) *
+            2;
         out_vertices.add(coord_type(v0.x - dx1, v0.y + dy1));
         a1 += da;
         a2 -= da / 4;
diff --git a/xfa/src/fxgraphics/src/fx_graphics.cpp b/xfa/src/fxgraphics/src/fx_graphics.cpp
index 2ad7cd5..792f517 100644
--- a/xfa/src/fxgraphics/src/fx_graphics.cpp
+++ b/xfa/src/fxgraphics/src/fx_graphics.cpp
@@ -978,8 +978,8 @@
           FX_FLOAT x = (FX_FLOAT)(column);
           FX_FLOAT y = (FX_FLOAT)(row);
           FX_FLOAT scale =
-              FXSYS_Div(((x - start_x) * x_span) + ((y - start_y) * y_span),
-                        axis_len_square);
+              (((x - start_x) * x_span) + ((y - start_y) * y_span)) /
+              axis_len_square;
           if (scale < 0) {
             if (!_info._fillColor->_shading->_isExtendedBegin) {
               continue;
@@ -1016,7 +1016,7 @@
                        ((y - start_y) * (y - start_y)) - (start_r * start_r);
           FX_FLOAT s;
           if (a == 0) {
-            s = (FXSYS_Div(-c, b));
+            s = -c / b;
           } else {
             FX_FLOAT b2_4ac = (b * b) - 4 * (a * c);
             if (b2_4ac < 0) {
@@ -1025,11 +1025,11 @@
             FX_FLOAT root = (FXSYS_sqrt(b2_4ac));
             FX_FLOAT s1, s2;
             if (a > 0) {
-              s1 = FXSYS_Div(-b - root, 2 * a);
-              s2 = FXSYS_Div(-b + root, 2 * a);
+              s1 = (-b - root) / (2 * a);
+              s2 = (-b + root) / (2 * a);
             } else {
-              s2 = FXSYS_Div(-b - root, 2 * a);
-              s1 = FXSYS_Div(-b + root, 2 * a);
+              s2 = (-b - root) / (2 * a);
+              s1 = (-b + root) / (2 * a);
             }
             if (s2 <= 1.0f || _info._fillColor->_shading->_isExtendedEnd) {
               s = (s2);
diff --git a/xfa/src/fxgraphics/src/fx_path_generator.cpp b/xfa/src/fxgraphics/src/fx_path_generator.cpp
index c9e20b3..b37105f 100644
--- a/xfa/src/fxgraphics/src/fx_path_generator.cpp
+++ b/xfa/src/fxgraphics/src/fx_path_generator.cpp
@@ -119,8 +119,8 @@
                               FX_FLOAT sweep_angle) {
   FX_FLOAT x0 = FXSYS_cos(sweep_angle / 2);
   FX_FLOAT y0 = FXSYS_sin(sweep_angle / 2);
-  FX_FLOAT tx = FXSYS_Div((1.0f - x0) * 4, 3 * 1.0f);
-  FX_FLOAT ty = y0 - FXSYS_Div(tx * x0, y0);
+  FX_FLOAT tx = ((1.0f - x0) * 4) / (3 * 1.0f);
+  FX_FLOAT ty = y0 - ((tx * x0) / y0);
   FX_FLOAT px[3], py[3];
   px[0] = x0 + tx;
   py[0] = -ty;