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

### Instruction:
 一个教室里男生和女生的比例是3:5。如果女生比男生多4个，那么教室里有多少学生？


### Response:
 教室里有7个男生。
教室里有9个女生。
总共有7个男生 + 9个女生 = <<7+9=16>>16个学生。