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

### Instruction:
There are 20 hands in Peter’s class, not including his. Assume every student in the class has 2 arms and 2 hands. How many students are in Peter’s class including him?

### Response:
 มีมือทั้งหมด 20 + 2 ของพีเตอร์ = <<20+2=22>>22 มือ
22 มือ / 2 มือต่อคน = <<22/2=11>>11 คน