Mass of the Earth, M = 6.0 × 10²⁴ kg
Mass of the satellite, m = 200 kg
Radius of the Earth, R_e = 6.4 × 10⁶ m
Universal gravitational constant, G = 6.67 × 10^–11 Nm²kg^–2
Height of the satellite, h = 400 km = 4 × 10⁵ m = 0.4 ×10⁶ m
Total energy of the satellite at height h = (1/2)mv² + [ -GM_em / (R_e + h) ]
Orbital velocity of the satellite, v = [ GM_e / (R_e + h) ]^1/2
Total energy of height, h = (1/2)GM_em / (R_e + h) - GM_em / (R_e + h)  =  -(1/2)GM_em / (R_e + h)
The negative sign indicates that the satellite is bound to the Earth. This is called bound energy of the satellite.
Energy required to send the satellite out of its orbit = – (Bound energy)
= (1/2) GM_em / (R_e + h)
= (1/2) × 6.67 × 10^-11 × 6 × 10²⁴ × 200 / (6.4 × 10⁶ + 0.4 × 10⁶)
= 5.9 × 10⁹ J.