Mom goes to work at 8:00 a.m. on Wednesday, leaves work at 5:00 p.m., and takes a break at noon at 2:00 p.m. How long does mom work this day?
妈妈星期三上午8时上班，下午5时下班，中午休息2时，妈妈这一天工作多长时间？
<gadget id="calculator">17 - 8 - 2</gadget>
<output>7</output>

<result>7</result>