How is the gravitational force between two masses affected if the separation between them is doubled ?

As we know,

F = G $\dfrac{m$1 m2}{r^2}

If separation between two bodies is doubled then,

F = G $\dfrac{m$1 m2}{(2r)^2}

Hence,

F = G $\dfrac{m$1 m2}{4r^2}

Therefore, when the separation between the bodies is doubled the gravitational force reduces to one-fourth.