What is the force of gravity between a 1 kg asteroid and the earth when the asteroid is 3 m away from the earth?

Mass of the Earth = 5.972 x 10²⁴ kg
Mass of the asteroid = 1 x 10⁹ kg
Separation distance = 3 x 10⁶ m  (between the Earth's center and the asteroid's center)
                   

Gravitational force between two masses =

        (6.67 x 10⁻¹¹ nt-m²/kg²) · m₁ · m₂ / (distance)²

=  (6.67 x 10⁻¹¹ nt-m²/kg²) · (5.972 x 10²⁴ kg) ·  (1 x 10⁹ kg) / (3 x 10⁶ m)²

=  (6.67 · 5.972 / 9) x 10¹⁰ · (nt · m² · kg · kg / kg² · m²)

             =      13.28 x 10¹⁰     newtons

             =        132.8  Giga-newtons .

     (about  14,926,763 tons)