what is the gravity equal to on earth...
As phrased your question cannot be answered. Please be more specific, just what do you mean?
What do you mean by "gravity"? The force of gravity is your weight (and varies from person to person, object to object). The "acceleration due to gravity" also varies slightly from place to place on the surface of the earth but "9.81 m/s2" is a good approximation.
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