diff --git a/src/threads/fixed-point.h b/src/threads/fixed-point.h
index c6872cf..b192073 100644
--- a/src/threads/fixed-point.h
+++ b/src/threads/fixed-point.h
@@ -18,6 +18,9 @@
 #define FP_SUBTRACT_INT(x, n) ((x) - ((n) * (CONVERSION_CONST)))
 
 /* Fixed Point Arithmetic multiplication operations */
-
+#define FP_MULTIPLY(x, y) ((int64_t)(x)) * (y) / (CONVERSION_CONST)
+#define FP_MULTIPLY_INT(x, n) ((x) * (n))
+#define FP_DIVIDE(x, y) ((int64_t)(x)) * (CONVERSION_CONST) / (y)
+#define FP_DIVIDE_INT(x, n) ((x) / (n))
 
 #endif //FIXED_POINT_H