Mr. Wang has 48 compositions to correct, and 12 have already been corrected. If 3 articles are edited every hour, how many hours will it take to complete the edits?
王老师要批改48篇作文，已经批改了12篇．如果每小时改3篇，还要几小时能改完？
<gadget id="calculator">48 - 12</gadget>
<output>36</output>

<gadget id="calculator">36 / 3</gadget>
<output>12</output>

<result>12</result>