What is the product of the coordinates of the midpoint of a line segment with endpoints at $(1,1)$ and $(-7,5)$?
<|im_start|>system
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<|im_start|>user
What is the product of the coordinates of the midpoint of a line segment with endpoints at $(1,1)$ and $(-7,5)$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
-9
What is the product of the coordinates of the midpoint of a line segment with endpoints at $(1,1)$ and $(-7,5)$?
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