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

### Instruction:
 一个繁忙的港口有4艘游轮和两倍于此的货船。帆船的数量比货船多6艘，比渔船多7倍。水上有多少艘船？


### Response:
 游轮：4艘
货船：4(2)=8艘
帆船：8+6=14艘
渔船：14/7=<<14/7=2>>2艘
所有船只：4+8+14+2=<<4+8+14+2=28>>28艘