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

### Instruction:
 一条面包被切成了15片。十个朋友买了4条面包。如果他们平均吃完了这4条面包，每个人吃了多少片面包？


### Response:
 4条面包中有15 x 4 = <<15*4=60>>60片面包。
因此，每个人吃了60/10 = <<60/10=6>>6片面包。