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

### Instruction:
 斯特拉想为即将到来的舞会买一件新裙子。在商店里，她发现她想要的裙子售价为50美元。商店正在全店范围内提供7折优惠。这件裙子的最终价格是多少？


### Response:
 50的30%是<<50*30/100=15>>15美元，所以这件裙子原价是50美元，现在是35美元。