kg are units of mass. The acceleration on the moon due to gravity is roughtly 1/6 that of earth. A more precise figure is 1.62 m/s^2
a = 1.62 m/s^2
m = 83 kg
F = ?
F = m * a
F = 83 * 1.62
F = 134.46 Moon's gravitational force on 83 kg man
On earth the force would be 83 * 9.81 = 814.23 Newtons.