Versuch es selber - AngularJS ng_bind

<!DOCTYPE html>
<html>
<script src="/lib/angular-1.4.8.min.js"></script>
<body>

<div ng-app="" ng-init="quantity=1;cost=5">
<p>Total in dollar: <span ng-bind="quantity * cost"></span></p>
</div>

</body>
</html>