diff --git a/Calculator_Contract.sol b/Calculator_Contract.sol
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+++ b/Calculator_Contract.sol
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+// Calculator! Smart contract written in Solidity, which is a popular programming language for creating Ethereum smart contracts:
+
+// SPDX-License-Identifier: MIT
+pragma solidity ^0.8.0;
+
+/**
+ * @title Calculator
+ * @dev A simple smart contract for performing basic arithmetic operations.
+ */
+contract Calculator {
+    /**
+     * @dev Adds two numbers and returns the result.
+     * @param a The first number.
+     * @param b The second number.
+     * @return The sum of a and b.
+     */
+    function add(uint256 a, uint256 b) public pure returns (uint256) {
+        return a + b;
+    }
+
+    /**
+     * @dev Subtracts two numbers and returns the result.
+     * @param a The first number.
+     * @param b The second number.
+     * @return The difference between a and b.
+     */
+    function subtract(uint256 a, uint256 b) public pure returns (uint256) {
+        require(a >= b, "Subtraction underflow");
+        return a - b;
+    }
+
+    /**
+     * @dev Multiplies two numbers and returns the result.
+     * @param a The first number.
+     * @param b The second number.
+     * @return The product of a and b.
+     */
+    function multiply(uint256 a, uint256 b) public pure returns (uint256) {
+        return a * b;
+    }
+
+    /**
+     * @dev Divides two numbers and returns the result.
+     * @param a The numerator.
+     * @param b The denominator.
+     * @return The result of a divided by b.
+     */
+    function divide(uint256 a, uint256 b) public pure returns (uint256) {
+        require(b != 0, "Division by zero");
+        return a / b;
+    }
+}