Okay, so you mean you managed to get 8.17 g/cm^3? What was wrong then?

not wrong, I just not know how to calculate it in my pocket calculator.
if you are trying to calculate what I wrote in those formulas you get also 8.17 g/cm^3 ?
just try to calculate as I write it,

thank you :)

Lol, okay. Anyway, I still don't know where those numbers come from nor what they represent, but as long as you understand what you are doing, I'm fine :)

:) yep