Xiaoling's mother goes to work at 9:00 in the morning and leaves at 5:00 in the afternoon. How many hours does she work in a day?
小玲妈妈早上9：00上班，到下午5：00下班，她一天工作多少小时．
<gadget id="calculator">17 - 9</gadget>
<output>8</output>

<result>8</result>