The energy released per fission of nucleus of ${ }^{240}\mathrm{X}\text{ is }200\mathrm{MeV}$ . The energy released if all the atoms in 120 g of pure ${ }^{240}\mathrm{X}$ undergo fission is _____ $\times {10}^{25}\mathrm{MeV}\cdot \left(\text{ Given }{\mathrm{N}}_{\mathrm{A}}=6\times {10}^{23}\right)$