Question

IF SOMEONE WHEIGHS 12 KG ON THE MOON SO HOW MUCH HE WILL WEIGH ON THE EARTH

Answer 1

12 kg is a mass, not a weight. The mass will stay the same on Earth and Moon.

If you are talking about kilograms as a weight unit, which is seldom done and not advised in physics, the answer would be about 72 kg WEIGHT, on Earth.