X^Y in Forms 4.5

Hi!
I'm trying to built a simple(?) routine to calculate a number powered to other. (X^Y)
Well, it looks simple, but... Y is not an integer. I's a real!! So as X, but the problem is not in X, but in Y!!!

I want to do it in PL/SQL and... i'm stucked!!!

Some help would be apreciated.

Thanks!

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