<human>:  At the bookstore, Sarah bought 6 paperback books and 4 hardback books. Her brother bought one-third as many paperback books as Sarah bought, and two times the number of hardback books that she bought. How many books did her brother buy in total?
<bot>: How many paperbacks did her brother buy? ** Her brother bought 6/3=<<6/3=2>>2 paperbacks
How many hardbacks did her brother buy? ** He bought 4*2=<<4*2=8>>8 hardbacks
How many books did her brother buy in total? ** In total he bought 2+8=<<2+8=10>>10 books
#### 10