If you don't know how a calculation is performed, depending on what you're doing, there's between a chance and a good chance you'll look at an error and not kno

If you don't know how a calculation is performed, depending on what you're doing, there's between a chance and a good chance you'll look at an error and not know it. Everything from bugs to typos to just using the wrong method for the job can cause you grief, and having an idea of what's going on makes it far easier to spot. I have been on both sides of that, and far prefer to know what I'm doing.