void setup() { float yourWeight = 75; // [kg] on Earth float marsWeight = calculateMars(yourWeight); println(marsWeight + "[kg] on Mars!"); } float calculateMars(float w) { float newWeight = w / GravitationalAccelerationValues.Earth * GravitationalAccelerationValues.Mars; return newWeight; } class GravitationalAccelerationValues{ static final float Mars = 3.71; static final float Earth = 9.8; }