diff --git a/fx_s4716_longlong.h b/fx_s4716_longlong.h
index 572348fe1bacb5fd819171ce6b8162378f4b7034..8b500399d5fd62b108e0bc49b67fb0ec7f119c4d 100644
--- a/fx_s4716_longlong.h
+++ b/fx_s4716_longlong.h
@@ -1,7 +1,7 @@
-#define FX_S4716_LONGLONG_MUL(a, b) (((a) * (b)) >> 16)
-#define FX_S4716_LONGLONG_MUL1(a, b) ((a >> 8) * (b >> 8))
-#define FX_S4716_LONGLONG_MUL2(a, b) (((a >> 4) * (b >> 4)) >> 8)
-
-#define FX_S4716_LONGLONG_DIV(a, b) ((a << 16) / (b))
-#define FX_S4716_LONGLONG_DIV1(a, b) (((a << 8) / (b)) << 8)
-#define FX_S4716_LONGLONG_DIV2(a, b) (((a << 4) / (b >> 4)) << 8)
+#define FX_S4716_LONGLONG_MUL(a, b) (((a) * (b)) >> 16)
+#define FX_S4716_LONGLONG_MUL1(a, b) ((a >> 8) * (b >> 8))
+#define FX_S4716_LONGLONG_MUL2(a, b) (((a >> 4) * (b >> 4)) >> 8)
+
+#define FX_S4716_LONGLONG_DIV(a, b) ((a << 16) / (b))
+#define FX_S4716_LONGLONG_DIV1(a, b) (((a << 8) / (b)) << 8)
+#define FX_S4716_LONGLONG_DIV2(a, b) (((a << 12) / (b)) << 4)