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

### Instruction:
 地球上曾经存在的最大动物是蓝鲸。成年蓝鲸的舌头重6000磅。如果一吨等于2000磅，成年蓝鲸的舌头可以重多少吨？


### Response:
 1. 如果一吨等于2000磅，那么6000磅等于6000磅/2000磅 = <<6000/2000=3>>3吨
2. 成年蓝鲸的舌头可以重3吨。