\sqrt{17}
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Evaluate $|1-4i|$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\sqrt{17}
Evaluate $|1-4i|$.
train