The question is using the famous equation by Einstein: E=mc²!
the energy in joules is the E from the equation! So we need to substitute m (0.112 kg) like this:
E=0.112(300 000 000)\(x^{2}\) (approximately)
which is 10080000000000000 in Kgm²/s²
or 10080000000000000 joules!
we can change it to gigajoules:
10080000
or terajoules: 1008!
