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

### Instruction:
 John na Sam walikuwa na njaa hivyo waliagiza pizza kubwa ya ziada ambayo ilikuwa imekatwa vipande 12. John alikula vipande 3 wakati Sam alikula mara mbili ya kile alichokula John. Vipande vingapi vya pizza vilisalia?


### Response:
 Sam alikuwa na mara mbili ya John hivyo Sam alikula vipande 3*2 = <<3*2=6>>6
Pamoja, walikula vipande 3+6 = <<3+6=9>>9
Pizza 1 ina vipande 12. Vipande 9 vilikula hivyo 12-9= <<12-9=3>>3 vipande vilisalia