What is the greatest common divisor of $654321$ and $543210$?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the greatest common divisor of $654321$ and $543210$?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
3
What is the greatest common divisor of $654321$ and $543210$?
train