John has 6*30=<<6*30=180>>180 students

So he bought 180*2=<<180*2=360>>360 packs

# Answer

360
Question:
John buys 2 packs of index cards for all his students.  He has 6 classes and 30 students in each class.  How many packs did he buy?
Answer:
Let's think step by step.

user
360
John buys 2 packs of index cards for all his students.  He has 6 classes and 30 students in each class.  How many packs did he buy?
train