<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://apps.bdimg.com/libs/angular.js/1.3.9/angular.min.js"></script></body></html>