Jennifer bought twice as many candies as Emily and three times as many as Bob bought. If Emily bought 6 candies, how many candies did Bob buy?
Jennifer bought twice as many as Emily (who bought 6 candies) which is 6*2 = 
<gadget id="calculator">6*2</gadget>
<output>12</output>
12 candies
12 candies (that Jennifer bought) is three times as much as what Bob bought which means 3*what Bob bought = 12.
Dividing both sides of the equation by 3 gives: Number of candies Bob bought = 12/3 = 
<gadget id="calculator">12/3</gadget>
<output>4</output>
4 candies.

<result>4</result>