Let's get an English major to take a calculator to the International Math Olympiad, and see how that goes.
If you do not understand the core concepts very well, by any rational definition of "understand," then you will not succeed at competitions like IMO. A calculator alone won't help you with math at this level, any more than a scalpel by itself would help you succeed at brain surgery.
Ive actually hung around Olympiad level folks and unfortunately, their reach of intellect was limited in specific ways that didnt mean anything in regards to the real economy.