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

### Instruction:
 亚当去商店买一些食物准备旅行。他买了3个三明治，每个三明治3美元，还有一瓶水2美元。亚当一共付了多少钱？


### Response:
 3个三明治的价格是3 * 3 = 9美元。
总共亚当购买的产品为2 + 9 = 11美元。