Below is an instruction that describes a task. Write a response that appropriately completes the request in English. Please answer in English.

### Instruction:
James prints out 2 books.  They are each 600 pages long.  He prints out double-sided and 4 pages per side.  How many sheets of paper does he use?

### Response:
He printed 600*2=<<600*2=1200>>1200 pages
Each sheet of paper was 4*2=<<4*2=8>>8 pages
So he used 1200/8=<<1200/8=150>>150 sheets
#### 150