What is JotForm?
JotForm is a free online form builder which helps you create online forms without writing a single line of code. No sign-up required.
At JotForm, we want to make sure that you’re getting the online form builder help that you need. Our friendly customer support team is available 24/7.
We believe that if one user has a question, there could be more users who may have the same question. This is why many of our support forum threads are public and available to be searched and viewed. If you’d like help immediately, feel free to search for a similar question, or submit your question or concern.
I am sorry but I do not understand exactly what you are referring to in your inquiry, could you please get back to us with more details as of what you would like your form works?
If you would like to calculate a Driving Distance, please take a look at this link:
This guide could be also helpful: http://www.jotform.com/help/259-How-to-perform-calculation-in-the-form
Let us know if we can further assist you.