how should i solve- 6.7 x 10^-11 x 6 x 10^24/(6.4 x 10^6)^2 step by step?

1.  Write it as  $$\frac{6.7\times 6\times 10^{-11}\times 10^{24}}{6.4^2 \times (10^6)^2}$$

2.  Now as  $$\frac{6.7\times 6 \times 10^{13}}{6.4^2 \times 10^{2*6}}$$

3.  Now  $$\frac{6.7\times 6 \times 10^{13-12}}{6.4^2}$$

4. Now  $$\frac{6.7 \times 6 \times 10}{6.4^2}$$

5. Now  $$\frac{67*6}{6.4^2}$$

6. Now calculate 67*6/6.4² = 9.81445...

Thank you!