diff --git a/calculator/script.js b/calculator/script.js
index ad7472e..8c67c31 100644
--- a/calculator/script.js
+++ b/calculator/script.js
@@ -9,6 +9,15 @@ function doOperation(operation, numA, numB) {
     case "+":
       return numA + numB;
       break;
+    case "÷":
+      return numA / numB;
+      break;
+    case "×":
+      return numA * numB;
+      break;
+    case "-":
+      return numA - numB;
+      break;
   }
 }