If $\frac{x}{y}= 2$ and $\frac{z}{x}= 4$, what is the value of $\frac{z}{y}$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $\frac{x}{y}= 2$ and $\frac{z}{x}= 4$, what is the value of $\frac{z}{y}$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
8
If $\frac{x}{y}= 2$ and $\frac{z}{x}= 4$, what is the value of $\frac{z}{y}$?
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