Okay, so I understand that a3/p2=M
I must be missing something though.
I know that (6x10^9)3 / (7.8x10^8)2 = 3.6x10^11 MSun
but I don't understand what step I'm missing. When I divide, I end up with 0.3550^12
what am I doing wrong?
Is my answer in kilograms, and do I have to convert it to MSun?