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

### Instruction:
 Kwenye sherehe ya kuogelea, kuna pizza 4 zilizokatwa vipande 12 kila moja. Ikiwa wageni wamekula vipande 39, vipande vingapi vimesalia?


### Response:
 Jumla ya vipande ni 4 x 12 = <<4*12=48>>48.
Baada ya wageni kula, kuna vipande 48 - 39 = <<48-39=9>>9 vilivyosalia.