3) \(\frac{5^9 \cdot 8^{11}}{40^9} = \frac{5^9 \cdot 8^{11}}{(5 \cdot 8)^9} = \frac{5^9 \cdot 8^{11}}{5^9 \cdot 8^9} = 8^{11-9} = 8^2 = 64\)
Ответ: 64