In the equation for the gravitational force between two objects, which quantity must be squared?

In the equation for the gravitational force between two objects, the distance quantity or measurement must be squared. The formula for calculation the gravitational force between two objects is F = G*m1*m2/d^2. F is the gravitational force between the two objects. G is the constant gravity, m1 is the first object's mass, m2 is the second object's mass, and d is the distance between the two objects.