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

### Instruction:
 在数学俱乐部里，男生的人数是女生的两倍。如果有6个女生成员，数学俱乐部总共有多少成员？


### Response:
 如果女生成员有6个，男生成员就有2 x 6 = 12个。
数学俱乐部的总成员数是12 + 6 = <<12+6=18>>18个。