Uncle Wang goes to work at 10:00 in the morning and leaves at 5:00 in the afternoon, how many hours does he work in a day
王叔叔上午10：00上班，下午5：00下班，他一天工作多少小时
<gadget id="calculator">17 - 10</gadget>
<output>7</output>

<result>7</result>