Hey fellas, especially you security nerds.

I've had asymmetric encryption explained to me a number of times but I can't get a handle on it because no example actually talks in human terms. They always say "two enormous prime numbers", which I understand, but I can't conceptualize.

Can someone walk me through an entire process, showing your math & work, using some very small, single- or double-digit primes? Such as if I were to encrypt the text "hello world" using prime numbers like 3, 5, and 7