Calculate based on 2 option boxes

[ccox]

I have 2 option boxes, impact and likelihood, with a numerical value. I would like the calculation of impact * likelihood to be updated in a text box for severity. Is this possible?

 

[khawar]

You should not be storing calculations
Just store value of option boxes in table and calculate the result in query

However if you want it would be a simple multiplication

YourTextBox = impact * likelihood

Use this code on the after update event of option boxes

 

[ccox]

There doesn't appear to be an After Update on option boxes and putting the code in the priority box isn't working either. any other ideas?