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

### Instruction:
 菲比吃了1份，给她的狗1份花生酱作为睡前小吃。每罐花生酱有15份。为了确保她和她的狗有足够的花生酱可以持续30天，她需要多少罐？


### Response:
 菲比和她的狗每天睡前各吃1份，所以30天共计30 x 2 = 60份。
每罐花生酱有15份，她需要60份来持续30天，所以她需要60/15 = 4罐花生酱。