The Moon is 3.8 108 m from Earth and has a mass of 7.34 1022 kg. 5.97 1024 kg is the mass of the Earth.
On the surface of the Moon, the acceleration caused by gravity around 1.625 m/s2 which is 16.6% greater than on the surface of the Earth 0.166.
Gravity is zero if you are in the centre of the earth since everything around you is pulling "up" (up is the only direction).
It is around 1700 kilometres below Earth's surface.
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