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

### Instruction:
 吉米决定为野餐做三明治。他总共做了8个三明治，每个三明治用两片面包。假设他开始没有面包，每包面包有4片面包，他需要买多少包面包来做这些三明治？


### Response:
 8个三明治 * 2片面包/三明治 = <<8*2=16>>16片面包需要
16片面包 / 4片面包/包 = <<16/4=4>>4包面包需要