Josh buys 3 packs of string cheese.  Each piece of string cheese cost 10 cents.  Each pack has 20 string cheeses in them.  How many dollars did he pay?
Each pack cost 20*10=<<20*10=200>>200 cents
So each pack cost 200/100=$<<200/100=2>>2
That means he pays 2*3=$<<2*3=6>>6
#### 6