How will the force of gravity change if the distance between two bodies increases six times?

The distance between the bodies changed from r to R:
R = 6r.
The gravity will change from F₁ to F₂:
F₁ = Gm₁m₂ / r², where G is the gravitational constant, m₁ and m₂ are the masses of bodies.
F₂ = Gm₁m₂ / R² = Gm₁m₂ / (6r) ² = Gm₁m₂ / 36r² = 1/36 (Gm₁m₂ / r²) = 1 / 36F₁;
Answer: The force of gravity will decrease 36 times.