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

### Instruction:
 一栋建筑有300个单位。一半的单位是住宅，另一半平均分配在办公室和餐厅之间。这栋建筑里有多少个餐厅？


### Response:
 办公室和餐厅的单位总共有300/2 = <<300/2=150>>150个。
这栋建筑里有75个餐厅。