What is the smallest 3-digit number of the form $aaa$ such that it is divisible by 9? (Here, $a$ represents a digit.)
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
What is the smallest 3-digit number of the form $aaa$ such that it is divisible by 9? (Here, $a$ represents a digit.)
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
333
What is the smallest 3-digit number of the form $aaa$ such that it is divisible by 9? (Here, $a$ represents a digit.)
train