<html>
<body>
<div data-ng-app="" data-ng-init="quantity=1;price=5">
<h2>价格计算器</h2>
数量: <input type="number" ng-model="quantity">
价格: <input type="number" ng-model="price">
<p><b>总价:</b> {{quantity * price}}</p>
</div>
<script src="https://libs.baidu.com/angular.js/1.2.5/angular.min.js"></script>
</body>
</html>