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

### Instruction:
 每吃一个三明治，山姆吃四个苹果。如果他每天吃10个三明治，一个星期吃多少个苹果？


### Response:
 在一天里，山姆吃10个三明治 * 4个苹果/三明治 = <<10*4=40>>40个苹果。
一个星期里，他吃7天 * 40个苹果/天 = <<7*40=280>>280个苹果。