(PCC)::[How-to-use-The-ng-model-Directive-in-AngularJS]::[angularjs]
<!DOCTYPE html>
<html>
<script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.6.9/angular.min.js"></script>
<body>
<div data-ng-app="" data-ng-init="quantity=1;price=5">
<h2>Cost Calculator</h2>
Quantity: <input type="number" ng-model="quantity">
Price: <input type="number" ng-model="price">
<p><b>Total in dollar:</b> {{quantity * price}}</p>
</div>
</body>
</html>
Total in dollar: {{quantity * price}}