diff --git a/web/src/app/challenges/functions/calculator.js b/web/src/app/challenges/functions/calculator.js
new file mode 100644
index 0000000..8c9bfe5
--- /dev/null
+++ b/web/src/app/challenges/functions/calculator.js
@@ -0,0 +1,29 @@
+// Calculator module that performs basic arithmetic operations
+function Calculator(num1, num2) {
+  function sum() {
+    return num1 + num2;
+  }
+
+  function difference() {
+    return num1 - num2;
+  }
+
+  function product() {
+    return num1 * num2;
+  }
+
+  function dividend() {
+    if (num2 === 0) return "Error: Division by zero!";
+    return Math.floor(num1 / num2);
+  }
+
+ 
+  return { sum, difference, product, dividend };
+}
+
+// Example usage
+const calc12And5 = Calculator(12, 5);
+console.log("Sum:", calc12And5.sum()); 
+console.log("Difference:", calc12And5.difference()); 
+console.log("Product:", calc12And5.product()); 
+console.log("Dividend:", calc12And5.dividend());