You aint kidding! To me to. No, I wish I were a Mathematical Genius, but no. I just experiment. I may do a tutorial or two, then open the program & see what I can do. But I know no formulas, & my mind only computes under strict crafting situations.
That seems more fun that way - just to play and see what happens. It doesn't seem quite as interesting if you know what you're doing. I say that mostly because it's over my head