Thanks; I think it was the modulus node (that I didn’t know about) that I really needed for my full blueprint context, so I looked up now how this works.
I asked the question in a generic way because I know my game’s context won’t be the same as what someone else might need.
In my game I increase population every few seconds, and so I need to increase a money multiplier value for each increase of 10 in population. I think I can see how I’ll do this now, so thanks again.