The students in the Biology Group of Zhaohui Primary School collected specimens, and the collected butterflies belonged to dragonflies (2/3), and the dragonflies belonged to beetles (1/4). There are 12 butterflies, how many beetles are there?
朝晖小学生物小组的同学收集标本，收集到的蝴蝶是蜻蜓的(2/3)，蜻蜓是甲壳虫的(1/4)．蝴蝶有12只，甲壳虫有多少只？
<gadget id="calculator">2 / 3</gadget>
<output>2/3 = around 0.666667</output>

<gadget id="calculator">1 / 4</gadget>
<output>1/4 = around 0.25</output>

<gadget id="calculator">12 / (2/3) / (1/4)</gadget>
<output>72</output>

<result>72</result>