$${a = 6,67 \cdot {10^{ - 11}} \cdot \frac{{5,98 \cdot {{10}^{24}}}}{{{{(6,37 \cdot {{10}^6})}^2}}} = 9,83 \approx 9,8\left( {\frac{{\rm{m}}}{{{{\rm{s}}^{\rm{2}}}}}} \right)}$$