400
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the value of $19^2 + 2(19) + 1$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
400
What is the value of $19^2 + 2(19) + 1$?
train