diff --git a/src/main/c/Calculator/calculator.c b/src/main/c/Calculator/calculator.c
index 06be2f8..84165cf 100644
--- a/src/main/c/Calculator/calculator.c
+++ b/src/main/c/Calculator/calculator.c
@@ -80,6 +80,10 @@ double combination(int n, int r);
             return num1 * num2;
         case 4:
             return num1 / num2;
+        case 5:
+            return pow(num1, num2);
+        case 6:
+            return fmod(num1, num2);