<!DOCTYPE html>
<html>
<head>
<meta charset="utf-8">
<script src="/js/angular.js1.4.6/angular.min.js"></script>
</head>
<body>
<div ng-app="" ng-init="quantity=1;cost=5">
<p>总价: <span ng-bind="quantity * cost"></span></p>
</div>
</body>
</html>