Weight of the object on surface of any planet is given as the gravitational pull on the object due to planet
This gravitational pull is defined as formula below

m = mass of object
g = acceleration due to gravity of the planet
now here it is given that weight on the planet is 370 N which is defined as the force due to planet
Also the mass is given as 100 kg
now using the formula above



so the gravitational strength of the mars will be 3.7 m/s^2