calculator <title> buttons </title> <style> #p{height:540px; width:275px; border: 2px solid black; margin:auto; padding:10px; } #calc{ width: 250px; margin-top:10px; margin-left:10px; border: 1px solid gray; border-radius: 3px; padding: 20px; margin: auto; } input { width: 10px; background-color:black; color: white; border: 1px solid gray; border-radius: 5px; padding: 26px; margin: 5px; font-size: 15px; } #clear{ width: 270px; border: 3px solid gray; border-radius: 1px; padding: 20px; background-color: black; color:white; } </style>