If $j$ is a positive integer and the expression $(7j+3)$ is multiplied by 3 and then divided by 7, what is the remainder?
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
If $j$ is a positive integer and the expression $(7j+3)$ is multiplied by 3 and then divided by 7, what is the remainder?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
2
If $j$ is a positive integer and the expression $(7j+3)$ is multiplied by 3 and then divided by 7, what is the remainder?
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