diff --git a/test.cpp b/test.cpp
new file mode 100644
index 0000000..ef3dba0
--- /dev/null
+++ b/test.cpp
@@ -0,0 +1,9 @@
+#include<iostream>
+#include<math.h>
+using namespace std;
+
+int main(){
+    int a = 9;
+    cout << floor(a/4) << endl;
+    return 0;
+}
\ No newline at end of file
diff --git a/test.exe b/test.exe
new file mode 100644
index 0000000..c47e78a
Binary files /dev/null and b/test.exe differ
diff --git a/zoom.cpp b/zoom.cpp
index 9950cbe..efa3700 100644
--- a/zoom.cpp
+++ b/zoom.cpp
@@ -24,7 +24,8 @@ int main(int argc, char ** argv)
 	pColorTableSize = 1024;
  
 	unsigned char *pBmpBuf;
-	int lineByte = (width*biCount / 8 + 3) / 4 * 4;
+	int lineByte = width*floor(biCount/8);
+	while(lineByte % 4 != 0){lineByte += 1;}
 	pBmpBuf = new unsigned char[lineByte*height];
 	fread(pBmpBuf, lineByte*height, 1, fp);
 	fclose(fp);
@@ -38,7 +39,8 @@ int main(int argc, char ** argv)
 	scanf("%f", &k);
 	int dstWidth = round(double(k*width));
 	int dstHeight = round(double(k*height));
-	int lineByte2 = (dstWidth*biCount / 8 + 3) / 4 * 4;
+	int lineByte2 = dstWidth*floor(biCount/8);
+	while(lineByte2 % 4 != 0){lineByte2 += 1;}
 	
 	unsigned char*pBmpBuf2;
 	pBmpBuf2 = new unsigned char[lineByte2*dstHeight];
diff --git a/zoom.exe b/zoom.exe
index 12bbca9..f870574 100644
Binary files a/zoom.exe and b/zoom.exe differ