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

### Instruction:
Alyana has a pizza that is cut into 16 slices. After she and her friends finish eating, there are 4 slices left. If each of them ate 2 slices of pizza, how many people ate the pizza?

### Response:
 16 - 4 = <<16-4=12>>12 ชิ้นของพิซซ่าถูกกิน
ดังนั้นมี 12/2 = <<12/2=6>>6 คนกินพิซซ่า