what i gained from learnign math using trig and log tables, pencil and paper to calculate fractions, multiplying them, more numbers, more calculations, => feel for a solution. yes, it is subjective, by looking at a problem there are no magic that pops out, just a feel for what would be a correct answer. objectively, the experience how to simplify is a great gain as well. ... then i studied logics. today i can calcualte areas, circumferences in my head, faster then using my phones calculator. the precesion is acceptable for my daily use.