Improve Calculator README documentation

Calculator/readme.md

@@ -1,7 +1,64 @@
-#Create Simple Calculator using HTML, CSS and JavaScript
+# Calculator Project
 
-**Functionality**
-1. Buttons to type number
-2. Buttons to add, subtract, multiply and divide
-3. Button to clear everything
+## Description
+This Calculator project is a simple web-based application included in the Mini-Projects repository by Axe-Pearl.  
+The purpose of this project is to demonstrate basic frontend development concepts using HTML, CSS, and JavaScript.  
+It allows users to perform fundamental arithmetic calculations through an intuitive interface.
 
+---
+
+## Features
+- Addition
+- Subtraction
+- Multiplication
+- Division
+- Simple and clean user interface
+- Beginner-friendly code structure
+
+---
+
+## Technologies Used
+- HTML
+- CSS
+- JavaScript
+
+---
+
+## Installation
+
+To run the project locally, follow these steps:
+
+git clone https://github.com/Axe-Pearl/Mini-Projects.git  
+cd Mini-Projects/Calculator  
+
+Open the `index.html` file in any modern web browser.
+
+---
+
+## Usage
+1. Open the calculator in your browser.
+2. Enter numbers using the on-screen buttons.
+3. Select an arithmetic operator.
+4. Click the equals (`=`) button to display the result.
+5. Use the clear (`C`) button to reset the calculator.
+
+---
+
+## Project Structure
+
+Calculator/  
+├── cal.html  
+├── cal.css  
+├── cal.js  
+└── c10.png  
+
+---
+
+## Contribution
+This project is part of the Mini-Projects collection.  
+Contributions that improve clarity, documentation, or user experience are welcome.
+
+---
+
+## License
+This project is intended for learning and educational purposes.