72^72 / (6^16*24^54*18^36) = ???

[latex]= \frac{8^{72}*9^{72}}{2^{16}*3^{16}3^{54}8^{54}2^{36}9^{36}}= \frac{2^{216}*3^{142}}{2^{214}*3^{142}}=2^2=4 [/latex]