[tex]\left(2^8\cdot 3^7\cdot 5^{10}\right)^2:\left(4^7\cdot 3^{14}\cdot 5^{18}\right) =\\ \\ =\left(2^{16}\cdot 3^{14}\cdot 5^{20}\right):\left(2^{14}\cdot 3^{14}\cdot 5^{18}\right) \\ \\ =2^{16-14}\cdot 5^{20-18}\\ \\ = 2^2\cdot 5^2\\ \\ = 4\cdot 25\\ \\ = 100[/tex]
