869
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Compute $\sqrt{(31)(30)(29)(28)+1}.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
869
Compute $\sqrt{(31)(30)(29)(28)+1}.$
train