Xiaohong has 160 storybooks, twice as many as Xiaoping, and Xiaodong has three times as many as Xiaoping. How many books are there in Xiaodong's storybook?
小红有故事书160本，是小萍故事书本数的2倍，而小冬的本数是小萍的3倍．小冬故事书的本数是多少本？
<gadget id="calculator">160 / 2</gadget>
<output>80</output>

<gadget id="calculator">80 * 3</gadget>
<output>240</output>

<result>240</result>