1,\!722
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Compute without using a calculator: $42!/40!$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
1,\!722
Compute without using a calculator: $42!/40!$
train