Update README.md

README.md

@@ -22,7 +22,7 @@ Usage: mkbiosfont font_size bmp_file
 ```
 Just remember that mkbiosfont will accept only 8x8, 8x14 and 8x16 font sizes. Slicing works the same
 way as in stripbmp, so if you want a font for all 256 chars and 8x8 font size you should create 128x128
-(16*8=128) or 2048x8 (256*8=2048) bitmap. Or any other size which will give 256 characters. It is also
+(16\*8=128) or 2048x8 (256\*8=2048) bitmap. Or any other size which will give 256 characters. It is also
 possible to create smaller charsets but not bigger.
 
 ## Usage Info