Question

When the center of Earth is 2 × 1011 meters from the center of Mars, the force of gravity between the two planets is about 64.32 × 1014 newtons. The mass of Earth is about 6 × 1024 kilograms, and the mass of Mars is about 6.4 × 1023 kilograms.?

Answer 1

I calculate it as 6.407 x 10^15 newtons.
Your answer is 6.432 x 10^15 newtons so I'd say that's an accurate calculation.