Get the coordinate of a tap/click and generate an effect on UI

Hi, this is the sistuation: i have a button that, if tapped, subtract from "floatA" "floatB". i'd like to have a number (floatB value) that pops out and that fade out, for the animation i know how to do it, the problem is that i don't know to instatiate an UI element on UI, and how to instantiate it in the point of the tap/click. is it possible? thanks in advance i utilize c#