Teacher Li has 52 essays to correct, and 7 of them have already been corrected. If the remaining 9 articles are corrected every hour, how many hours will it take to complete the correction?
李老师要批改52篇作文，已经批改了7篇．剩下的如果每小时批改9篇，还要几小时能批改完？
<gadget id="calculator">52 - 7</gadget>
<output>45</output>

<gadget id="calculator">45 / 9</gadget>
<output>5</output>

<result>5</result>