Mr. Wang has 58 compositions to be corrected, and 13 have already been corrected. If 9 articles are edited every hour, how many hours will it take to complete the edits?
王老师要批改58篇作文，已经批改了13篇．如果每小时改9篇，还要几小时能改完？
<gadget id="calculator">58 - 13</gadget>
<output>45</output>

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

<result>5</result>