This value is multiplied by the original mass of the body.

One second in real time is this amount of days in the simulation.

This value is multiplied by the Gravitational Constant.

The force of gravity between two bodies is given by multiplying the Gravitational Constant by the masses of the bodies, then dividing the result by the square of the distance between them.

By adjusting the Gravitational Constant, gravitational force is changed all throughout the solar system (and the universe!)