Feat: LICENSE & README

Author: MDJAmin

LICENSE

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+MIT License
+
+Copyright (c) 2025 MDJAmin
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+## Demo
+
+Check out the live demo: [GitHub Pages Demo](https://mdjamin.github.io/basic-calc/)
+
+# Calculator
+
+A simple calculator built using HTML, CSS, and JavaScript.
+
+## Features
+
+- Basic arithmetic operations: Addition, Subtraction, Multiplication, and Division.
+- Clear button to reset the calculator.
+- Responsive design for better user experience.
+
+## Technologies Used
+
+- HTML
+- CSS
+- JavaScript
+
+## How to Use
+1. Click on the number buttons to input values.
+2. Select an arithmetic operator (+, -, \*, /).
+3. Click another number.
+4. Press `=` to get the result.
+5. Use the `Clear` button to reset the calculator.
+
+## Installation
+
+1. Extract the ZIP file.
+
+2. Open `index.html` in a browser.(you can do it With live server extended)
+
+## Live Demo
+
+[Live Demo](https://MDJAmin.github.io/Calculator)
+
+## Author
+
+Created by **MDJAmin**. Check out more projects on [GitHub](https://github.com/MDJAmin).