diff --git a/index.html b/index.html
index 65817cb..9007786 100644
--- a/index.html
+++ b/index.html
@@ -11,8 +11,8 @@
     return a+b;
   }
 
-  function product(a, b) {
-    return a * b;
+  function product(a, b, c) {
+    return a * b * c;
   }
 
   function divide(a, b) {