Removal of the first 0 if a number starts with a 0

I need the form to display the first 0, but when someone enters a number starting with 0 the displayed form automatically removed the first 0 when it is submitted. how do i change this so the first 0 is displayed once submitted 

You can set up a placholder on a field. You'll find this option in the Properties. Here's a screenshot:

We also have an Input Mask function that you might want to check. Here's a guide: Getting-Started-with-the-Basics-of-Input-Masking.

Hope that helps. Thank you.