He reads 100*3=<<100*3=300>>300 pages a week

So it would take 2100/300=<<2100/300=7>>7 weeks to read the book

# Answer

7
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Steve decides to read a new book.  He reads 100 pages Monday, Wed, and Friday.  The book is 2100 pages long.  How many weeks does it take to read them all?
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
7
Steve decides to read a new book.  He reads 100 pages Monday, Wed, and Friday.  The book is 2100 pages long.  How many weeks does it take to read them all?
train