Mr. Wang goes to work at 8:00 am every day, leaves work at 5:00 pm, and takes an hour break at noon. How many hours does Mr. Wang work in a day?
王老师每天上午8：00上班，下午5：00下班，中午休息1小时，王老师一天工作多少小时．
<gadget id="calculator">17 - 8 - 1</gadget>
<output>8</output>

<result>8</result>