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

### Instruction:
At a pool party, there are 4 pizzas cut into 12 slices each.  If the guests eat 39 slices, how many slices are left?

### Response:
 มีทั้งหมด 4 x 12 = <<4*12=48>>48 ชิ้น
หลังจากแขกกินแล้ว จะเหลือ 48 - 39 = <<48-39=9>>9 ชิ้น.