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

### Instruction:
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?

### Response:
 Ndugu yake Sarah alinunua vitabu 6/3=<<6/3=2>>2 vya karatasi laini
Ameunua vitabu 4*2=<<4*2=8>>8 vya karatasi ngumu
Ameunua vitabu 2+8=<<2+8=10>>10 jumla