<html><script src= "https://apps.bdimg.com/libs/angular.js/1.3.9/angular.min.js"></script><body><div ng-app="myApp" ng-controller="costCtrl">数量: <input type="number" ng-model="quantity">价格: <input type="number" ng-model="price"><p>总价 = {{ (quantity * price) | currency }}</p></div><script>var app = angular.module('myApp', []);app.controller('costCtrl', function($scope) { $scope.quantity = 1; $scope.price = 9.99;});</script></body></html>