The energy of one mole of photons of radiation of frequency $2 \times 10^{12} \mathrm{~Hz} \mathrm{in} \mathrm{J} \mathrm{mol}^{-1}$ is $\_\_\_\_$ . $($ Nearest integer $)\left(\right.$ Given: $\left.\mathrm{h}=6.626 \times 10^{-34} \mathrm{Js}, \mathrm{N}_{\mathrm{A}}=6.022 \times 10^{23} \mathrm{~mol}^{-1}\right)$