what's wrong with binding expression?


I am using plnkr.co editor for AngularJS practice and this is my first code, but it doesn't work correctly.
Can you tell me what I did wrong in my code below? When I type '{{ 843 / 42 }}', I am supposed to have a calculated value as an output, but I am not getting this value.

<!DOCTYPE html>

    <script data-require="angular.js@*" data-semver="2.0.0-alpha.31" src="https://code.angularjs.org/2.0.0-alpha.31/angular.js"></script>
    <link rel="stylesheet" href="style.css" />
    <script src="script.js"></script>
  <body ng-app>
    <h1>Hello Plunker!</h1>
    {{ 843 / 42 }}

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The Result:
Hello Plunker!
{{ 843 / 42 }}
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Carl TawnSystems and Integration DeveloperCommented:
I think your problem is simply that the path to AngularJS is wrong in your code - you are also pointing at an alpha release of version 2 rather than the latest release version.

Try using the following instead:
    <script data-require="angular.js@*" data-semver="2.0.0-alpha.31" src="https://code.angularjs.org/1.4.5/angular.js"></script>

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IzzyTwinklyAuthor Commented:
thanks Carl!
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