Ha Ha! That reminds me of my wife who thinks I'm A math genious as always asking "what is this plus that?". Use a calculator! you are faster! no i'm not, use a tape.etc etc. "600 is about that long".I remember reading about a chap, in the US,who cut a hole in his floor of his home so he could use his Leigh Jig to cut dovetails in long boards from the floor below. Try cutting by hand. Where there is a will there is a way: like your catch phrase.
Thanks for posting