Xiaofang's mother goes to work at the unit at 9:00 am and leaves work at 5:00 pm. How many hours does Xiaofang's mother work in a day?
小芳的妈妈上午9时到单位上班，下午5时下班，小芳的妈妈一天的工作时间是多少小时．
<gadget id="calculator">17 - 9</gadget>
<output>8</output>

<result>8</result>