Mother goes to work at 8:00 am, leaves work at 6:00 pm, and takes a two-hour break at noon. How many hours does mother work in a day?
妈妈上午8时上班，下午6时下班，中午休息两小时，妈妈一天工作多少小时．
<gadget id="calculator">18 - 8 - 2</gadget>
<output>8</output>

<result>8</result>