2 small ISQL questions (FORMS)

I've searched the many manuals and cannot find an answer to these small questions! 1: How do I get the fields of a form to clear after information is entered and added? It is very confusing for the user to have the old data still there when adding a number of rows one after the other. 2: I have a field to be displayed on the screen in a form. The value come from a column in a table. I want the value to be divided by 100 before it is displayed. I tried "after update of" but the old value is always displayed.