Errors in javascript aquarium calculator?

There are errors in my aquarium calculator code. Here is the original code:

<script type="text/javascript" src="https://ajax.googleapis.com/ajax/libs/jquery/1.11.1/jquery.min.js"></script>
<script type="text/javascript">
var result = 0;
var roundLength = 2;
[…]

See original post by invalid@example.com (CarpCharacin)