Given that PVnR=T, solve for n if P = 36.0, V = 8.6, R = 0.08, and T = 200

You must have meant PV/nR = T

PV = nRT
is that P = 36 atm or some other unit.
is that V = 8.6L or some other unit?
So n = PV/RT = 36*8.6/(0.08*200).