Update README.md

Author: dpakdev02-dev

README.md

@@ -1,2 +1,40 @@
-# Simple-Calculator
-Simple Calculator using HTML, CSS, and JavaScript
+# 🧮 Simple Calculator
+
+A basic calculator web application that performs simple arithmetic operations such as addition, subtraction, multiplication, and division.  
+
+🔗 **Live Demo:** (Add your deployed link here, e.g., GitHub Pages URL)
+
+---
+
+## 🚀 Features
+- Addition, subtraction, multiplication, division
+- Clear / Reset functionality
+- Simple and responsive UI
+- Works on all modern browsers
+
+---
+
+## 📸 Screenshot
+(Add a screenshot of your calculator UI here)
+
+---
+
+## 🛠️ Technologies Used
+- **HTML5**
+- **CSS3**
+- **JavaScript (ES6)**
+
+---
+
+## 🔧 Installation & Setup
+
+To run locally:
+
+```bash
+# Clone the repository
+git clone https://github.com/dpakdev02-dev/Simple-Calculator.git
+
+# Navigate into the project folder
+cd Simple-Calculator
+
+# Open index.html in a browser