Compute the least common multiple of $9999$ and $100{,}001$.
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Compute the least common multiple of $9999$ and $100{,}001$.
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
90{,}900{,}909
Compute the least common multiple of $9999$ and $100{,}001$.
train