Update README.md

README.md

@@ -183,17 +183,17 @@
 - a. mul
   - fx32_mul
   ~~~
-  (fixed32)((fa * fb) >> FX32_QNUM ) 
+  ((fa * fb) >> FX32_QNUM ) 
   ~~~
      1. fuction that multiplies fa and fb and divides it by 2^32
   - fx32_mul1
   ~~~
-  ((fixed32)(((fa>>16) * fb)>>16))
+  ((fa>>16) * fb)>>16)
   ~~~
      1. Same as fx32_mul, the same fuction as fa*fb>>32, first multiply fa/2^16 and fb, and divide the remaining 2^16
   - fx32_mul2
   ~~~
-  ((fixed32)(((fa>>8)*(fb>>8))>>16))
+  (((fa>>8)*(fb>>8))>>16)
   ~~~
      1. Same as above, the same fuction as fa*fb>>32, first multiply fa/2^8, fb/2^8, and divide the remaining 2^16
 - b. div