$$F=G\frac{M\times m}{d^{2}}; =\frac{6.7\times10^{-11}Nm^{2}kg^{2}\times6\times10^{24}kg\times7.4\times10^{22}kg}{(3.84\times10^{8}m)^{2}}$$
$F=\frac{GMm}{d^{2}}$
$G\in \mathrm{R}$
$M\in \mathrm{R}$
$m\in \mathrm{R}$
$d\in \mathrm{R}$
