Math Calculation Based on User Data

I believe this won’t work based on what I’ve read. But I may be wrong.

I’m trying to show in the app a calculated field that combines User Data (from their profile, that is unique to them) and standard data (in a table in the app).

I’ve been looking at Math calculated fields to get this done, but doesn’t look possible.

What didn’t work with this, can you show us what’s not possible?