Find the force a 67.5kg man would experience while standing on the surface of each of the following planets.

Earth - Mass = 5.98 x 10^24 kg - Distance = 6.337 x 10^5m - Force(N) =?
Mars - Mass = 6.34 x 10^23kg - Distance = 3.43 x 10^5m - Force(N)=?
Pluto - Mass = 5 x 10^23kg - Distance = 4 x10^5m - Force (N) = ?

in all cases, F = GMm/r^2 with m=67.5