Take the mean distance of the moon and the sun from the earth to be $0.4 \times {10^6}$ km and $150 \times {10^6}$ km respectively. Their masses are $8 \times {10^{22}}$ kg and $2 \times {10^{30}}$ kg respectively. The radius of the earth is $6400$ km. Let $\Delta {F_1}$ be the difference in the forces exerted by the moon at the nearest and farthest points on the earth and $\Delta {F_2}$ be the difference in the force exerted by the sun at the nearest and farthest points on the earth. Then, the number closest to ${{\Delta {F_1}} \over {\Delta {F_2}}}$ is :