Aunt Zhang works the night shift every Monday from 21:00 p.m. to 05:00 the next morning. During her shift, she has to process 280 sets of children's clothing. How many sets of children's clothing does Aunt Zhang process on average per hour?
张阿姨每周一值夜班的时间是从晚上21：00到次日早上05：00，值班时她要加工完280套童装，那张阿姨平均每小时加工多少套童装？
<gadget id="calculator">24 - 21</gadget>
<output>3</output>

<gadget id="calculator">5 + 3</gadget>
<output>8</output>

<gadget id="calculator">280 / 8</gadget>
<output>35</output>

<result>35</result>