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

### Instruction:
Farmer Brown raises emus, large birds. His flock has a total of 60 heads and legs. How many emus are in his flock?

### Response:
 นกอีมูแต่ละตัวมีหัวและขา 1+2=<<1+2=3>>3 ตัว
ดังนั้นฝูงนกมีจำนวน 60/3=<<60/3=20>>20 ตัว