Fun fact, RAW sqrt(2)=1.5
D&D now barely qualifies as math. There isn’t even any division. That said, really good at getting people to understand statistics.
And then there’s pathfinder with the agregious sacred geometry feat https://www.d20pfsrd.com/feats/general-feats/sacred-geometry/
See the trick to this is to get people to play games where it’s so hard to calculate the odds of success that they stop looking at the numbers and start vibing. Basically anything with dice pools works.
The math in D&D is much simpler than comparing item pricing in the supermarket.
D&D only requires addition, sometimes substraction (if you have low stats), and multiplication or division by 2 or 4.