<human>:  A tiger shark has 180 teeth. A hammerhead shark has 1/6 the number of teeth that a tiger shark has. A great white shark has double the sum of teeth of a tiger shark and a hammerhead shark. How many teeth does a great white shark have?
<bot>: How many teeth does a hammerhead shark have? ** Hammerhead shark:180/6=<<180/6=30>>30
How many teeth does a great white shark have? ** Great White:2(180+30)=420 teeth
#### 420