<!DOCTYPE html>
<html lang="en">
<head>
<meta charset="UTF-8">
<title> </title>
<link rel="stylesheet" type="text/css" href="main.css">
<script type="text/javascript" src="main.js"></script>
</head>
<body>
<div >
<div >
<inputtype="text" id="cacl-input"onkeydown="input();"readonly="readonly" />
</div>
<div>
<button> </button>
<button>←</button>
<button>CE</button>
<button onclick="clearInput();">C</button>
</div>
<div>
<button onclick="inputNum('9');">9</button>
<button onclick="inputNum('8');">8</button>
<button onclick="inputNum('7');">7</button>
<button onclick="add();">+</button>
</div>
<div>
<button onclick="inputNum('6');">6</button>
<button onclick="inputNum('5');">5</button>
<button onclick="inputNum('4');">4</button>
<button onclick="min();">-</button>
</div>
<div>
<button onclick="inputNum('3');">3</button>
<button onclick="inputNum('2');">2</button>
<button onclick="inputNum('1');">1</button>
<button onclick="mulipty();">*</button>
</div>
<div>
<button onclick="inputNum('0')">0</button>
<button>.</button>
<button onclick="divide();">/</button>
<button onclick="cacl();">=</button>
</div>
</div>
</body>
</html>