A simple Instrument for measuring the acceleration of gravity employs a linear spring from which a mass

Question:

A simple Instrument for measuring the acceleration of gravity employs a linear spring from which a mass is suspended. At a location on Earth where the acceleration of gravity is 32.174ft/s2 the spring extends 0.291 in. If the spring extends 0.116 in, when the instrument is on Mars, what is the Martian acceleration of gravity? How much would the spring extend on the moon, where g = 5.471 ft/s2