Find $|10-13i|\cdot |10+13i|$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Find $|10-13i|\cdot |10+13i|$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
269
Find $|10-13i|\cdot |10+13i|$.
train