How do i do a simple calculation on a text input box

ive got a text box input that holds a numeric value, and want to divide the input text field by a number and sent that number to numerous text input fields and keep the nemeric value in them until the numeric value being divided changes, and also would like to keep a second text input as an identical figure that was used to be divided and the value result aswell after being divided that will will be duplicated again to a second text input box that does not change if the numeric number entered is changed and that a another duplicated copy of the figures is made underneath the text input field.

Similar to a previous question, but this one has a calculation.using AS 2.0