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

### Instruction:
 约翰为他所有的学生买了2包索引卡。他有6个班级，每个班级有30名学生。他买了多少包？


### Response:
 约翰有6*30=<<6*30=180>>180名学生
所以他买了180*2=<<180*2=360>>360包。