Basic equation for friction of non-deformable objects is F=mu*N

F: Force due to friction

mu: coefficient of friction; varies by material

N: normal force, the force "pushing" the two objects together

If you notice, area does not come into this equation at all, which is where a lot of people get it wrong.

EDIT: I was actually just kinda trolling you, but you gave an unexpectedly mature response so I will take the effort to write this stuff out.