Math Matical Formulation

[cul8ter]

OK let us say that you create a new record, then you input a number in a field, lets say 1,000. now what i am trying to do is to get a second field to reconize what has been put in the first field and automatically put the correct number in the second field lets say the second field is to show 10% of 1,000. so you put 1,000 in the first field click off the page and 10% of that thousand automatically pops up in the second field. any ides??

[mr_vodka]

NumFieldB As a calculated result with formula being: NumFieldA * .1

[cul8ter]

Thank you