Question: Interactive e button

Hey all, as before I need an interactive button that shows the result of tihs function Y=Ae^x

I've made two text area, one for A and one for x, then another text area to display the result. 

This is my code

Do(%Nume = evalf(Do(%Pop)*exp(Do(%Growth))));

but the results appears like this 0.244e4 and not as a whole number. am I doing something wrong?

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