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

### Instruction:
 Alyana ana pizza iliyokatwa katika vipande 16. Baada ya yeye na marafiki zake kumaliza kula, kuna vipande 4 vilivyobaki. Ikiwa kila mmoja wao alikula vipande 2 vya pizza, watu wangapi walikula pizza?


### Response:
 16 - 4 = <<16-4=12>>Vipande 12 vya pizza vilikula.
Hivyo kulikuwa na watu 12/2 = <<12/2=6>>6 waliokula pizza.