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

### Instruction:
John decides to buy utensils.  They come in 30 packs with an equal number of knives, forks, and spoons.  How many packs does he need to buy if he wants 50 spoons?

### Response:
 แต่ละแพ็คมี 30/3=<<30/3=10>>10 ช้อน
ดังนั้นเขาต้องซื้อแพ็ค 50/10=<<50/10=5>>5 แพ็ค