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

### Instruction:
Jonas is a book collector.  He has so many books he is converting his third bedroom into a library.  This room has 400 square feet of space.  He plans to put several bookshelves in the room and each bookshelf takes up 80 square feet of space.  If he reserves 160 square feet of space to use for a desk and some walking space, how many shelves can he put in the room?

### Response:
 Ikiwa anahifadhi futi za mraba 160 kwa ajili ya meza na eneo la kutembea, basi eneo lililobaki katika chumba ni futi za mraba 400-160 = 240.
Ikiwa kila rafu ya vitabu inachukua eneo la futi za mraba 80, basi idadi ya rafu za vitabu zinazoweza kutoshea katika chumba ni 240/80 = <<240/80=3>>3.