jQuery Calculation Problem
<p>I've been struggling trying to get jQuery to make a calculation for me, and i'm kinda pulling my hair out a bit now!</p>

<p>I need to make a calculation to work out the theoretical weight of a given amount of steel sheets based upon the quantity and the dimensions. The output will be a weight in kg.</p>

<p>The equation is as follows:
Qty x 7.85 x Length(mm) x Width(mm) x Gauge(mm) / 1000</p>

<p>The details need to be pulled from form fields and then the result outputted to text or in an input, preferably as the person edits the quantity field.</p>

<p>You can see an example of what i am trying to achieve here: <a href="http://www.clifton.rogr.net/enquiry" rel="nofollow">http://www.clifton.rogr.net/enquiry</a></p>
