Find $\left(\frac{5}{7}\right)^{3}\left(\frac{4}{5}\right)^{3}$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Find $\left(\frac{5}{7}\right)^{3}\left(\frac{4}{5}\right)^{3}$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{64}{343}
Find $\left(\frac{5}{7}\right)^{3}\left(\frac{4}{5}\right)^{3}$.
train