<script>
    // your code goes here
</script>

<script>
    var a = 3;
    z = 5;

    (function() {
        var a = 3 + 5,
            b =  a / 2,
            str = "Inter" + "polation";

        z = z + 1;

        res = (a + b + z) * 3;

        // will output 'Interpolation: (8 + 4 + 6) * 3 = 54'
        console.log('#{str}: (#{a} + #{b} + #{z}) * 3 = #{res}'.interpolate());
    }).run();
</script>