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

### Instruction:
 伊莎贝尔的存钱罐里有204美元。她花了一半的钱买了一个玩具。然后她花了剩下的一半的钱给她弟弟买了一本书。还剩下多少钱，以美元计算？


### Response:
 买完玩具后，伊莎贝尔还剩下204/2=<<204/2=102>>102美元。
伊莎贝尔还剩下102/2=<<102/2=51>>51美元。