The distance between two bodies becomes 6 times more than the usual distance. The the gravitational force becomes :

36 times 6 times 1/6 times 1/36 times

1/36 times

\(\text{Gravitational Force : } F_g = G\frac{m_1 m_2}{r^2}\) As r' = 6r \(\text{New Gravitational Force : } F'_g = G\frac{m_1 m_2}{(6r)^2}\) \(F'_g = G\frac{m_1 m_2}{36r^2}\) \(F'_g = \frac{F}{36}\)