John buys cans of soup for buy 1 get one free.  He gets 30 cans with a normal price of $0.60.  How much does he pay? Let's think step by step and output the final answer after "####".
user
He pays for 30/2=<<30/2=15>>15 cans
So he spends 15*.6=$<<15*.6=9>>9
#### 9
John buys cans of soup for buy 1 get one free.  He gets 30 cans with a normal price of $0.60.  How much does he pay?
train