Multiply $152409600$ and $64$ to get $9754214400$.
$$8100\sqrt{9754214400\times 9^{2}}$$
Calculate $9$ to the power of $2$ and get $81$.
$$8100\sqrt{9754214400\times 81}$$
Multiply $9754214400$ and $81$ to get $790091366400$.
$$8100\sqrt{790091366400}$$
Factor $790091366400=362880^{2}\times 6$. Rewrite the square root of the product $\sqrt{362880^{2}\times 6}$ as the product of square roots $\sqrt{362880^{2}}\sqrt{6}$. Take the square root of $362880^{2}$.