cfo.html

<!DOCTYPE html>
<html ng-app="cfoApp">
  <head>
    <meta charset="utf-8">
    <title></title>
    <script src="https://ajax.googleapis.com/ajax/libs/angularjs/1.5.0-rc.0/angular.min.js">

    </script>
    <script type="text/javascript">
      var app = angular.module("cfoApp", []);
      app.controller("cfoController", function($scope) {
        console.log("oi");
      });
    </script>
  </head>
  <body ng-controller="cfoController">
    <input ng-model="mat" type="number" name="name" value="0" placeholder="Matemática"><br />
    <input ng-model="port" type="number" name="name" value="0" placeholder="Português"><br />
    <input ng-model="lit" type="number" name="name" value="0" placeholder="Literatura"><br />
    <input ng-model="geo" type="number" name="name" value="0" placeholder="Geografia"><br />
    <input ng-model="hist" type="number" name="name" value="0" placeholder="História"><br />
    <input ng-model="dir" type="number" name="name" value="0" placeholder="Direitos Humanos"><br />
    <input ng-model="qui" type="number" name="name" value="0" placeholder="Química"><br />
    <input ng-model="bio" type="number" name="name" value="0" placeholder="Biologia"><br />
    <input ng-model="fis" type="number" name="name" value="0" placeholder="Física"><br />
    <input ng-model="fl" type="number" name="name" value="0" placeholder="foreign language"><br />
    <input ng-model="red" type="number" name="name" value="0" placeholder="Nota da Redação"><br />


    Result:
    <span ng-init="0">{{(((mat * 3) + (port * 3) + (lit) + (geo) + (hist) + (dir * 2) + (qui * 3) + (bio * 2) + (fis * 3) + (fl)) / 20 * 2 + red)}}</span>
    <br>Número de acertos:
    <span>{{ mat + port + lit + geo + hist + dir + qui + bio + fis + fl}}</span>
  </body>
</html>