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

### Instruction:
 胡安需要10半加仑的牛奶来烤40个饼干。胡安需要多少半加仑的牛奶来烤200打饼干？


### Response:
 如果10半加仑的牛奶可以烤40个饼干，那么一半加仑的牛奶可以烤40/10 = 4个饼干。
如果一半加仑的牛奶可以烤4个饼干，那么烤200个饼干需要200/4 = <<200/4=50>>50半加仑的牛奶。