Simplify: $\frac{18!}{16!}$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Simplify: $\frac{18!}{16!}$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
306
Simplify: $\frac{18!}{16!}$
train