I want to end liken Albert Einstein

you do not need to be able to do calculus in order to do math or physics

I agree, but what if I really want to?

to do it in your head? multiplication alone past multiplying 3-digit numbers is cumbersome

but there are numerous compensatory methods:

• knuckles
• pen and paper
• quipu
• and more modern - calculator :D

I've never bothered with trying to do more then multiplying 3-digit numbers because it takes time and it is prone to mistakes, so it is not a prudent method,

btw if you take your NAS number and divide by 4 you will get prime number 18419

btw if you take your NAS number and divide by 4 you will get prime number 18419