30 boxes of apples are shipped, which is three times that of oranges, and bananas are shipped twice as many as oranges. How many boxes of bananas are shipped?
运来苹果30箱，是橘子的3倍，运来的香蕉是橘子的2倍，运来香蕉多少箱？
<gadget id="calculator">30 / 3</gadget>
<output>10</output>

<gadget id="calculator">10 * 2</gadget>
<output>20</output>

<result>20</result>