In my recent work, I've had a need to compute light gauge steel weak axis section modulii.
Since I'm cheap, I'm looking at the 1962 AISI light gauge steel design manual for guidance. They have some truly elegant examples solving for XX and YY section properties of light gauge channels and studs (channels with stiffener lips).
HOWEVER, boy do they round their numbers a lot. Boy, I tried to repeat their examples in a spreadsheet (after working through by hand - with a calculator) and I can't repeat their numbers unless I round, in my opinion, arbitrarily and too much.
I almost felt like getting out a slide rule (I have one, mostly as a knick-knack)...
I was able to repeat, to my satisfaction, the various examples only through "hit-r-miss" using the TRUNC() and CEILING() functions.