Simple calculator program in Java source code <! DOCTYPE html> <html> <head> <meta charset=“utf-8”> <title> Calculator using HTML Example </title> <link href=“https://fonts.googleapis.com/css2?family=Cookie&display=swap” rel=“stylesheet”> <!– CSS property to create interactive calculator interface —> <style> html { height: 100vh; display: flex; align-items: center; justify-content: center; background-color: #2d3436; background-image: linear-gradient(315deg, #2d3436 0%, #000000 74%); font-family: ‘Cookie’, cursive; } .title { margin-bottom: 10px; padding: 5px 0; …