Mom goes to work at 9:00 am and leaves work at 5:00 pm, how many hours does mother work in a day?
妈妈每天早上9时上班，下午5时下班，妈妈一天工作多少小时．
<gadget id="calculator">17 - 9</gadget>
<output>8</output>

<result>8</result>