“A 1 megaton bomb produces about 4 1015 J.”

I don’t know what the space is supposed to mean here. The energy released by the bomb would be many orders of magnitude larger than 41,015 J.

Solar energy is not measured in megatons.

A megaton is the equivalent effect in a nuclear explosion of one million tons of trinutrotoluene exploding simultaneously in a chemical explosion.

Explosive force does not measure efficiently in terms of heat or light energy in radiant form as in the case of insolation per unit area.

Better talk to your teacher. Sounds like some basic instruction in matter, energy, and units of measure is called for.

Good luck.