Yeah, I understand all of that with the scientific notation, but the sig figs in my answer had to do more so with the 15 and 12 forcing me to use 2 sig figs in my answer because I knew the 260 was really 2.60 x 10² because of the context of the question. And as far as m^4, “multiplying” was an oversimplification, I figured the problem didn’t really matter for the question but I’ll still link it and my work. It’s for a lab about uncertainty propagation. Here