The aunt in the store goes to work at 8:00 am and leaves work at 5:00 pm every day. How many hours does she work?
商店的阿姨每天早上8时上班，下午5时下班，工作多少小时．
<gadget id="calculator">17 - 8</gadget>
<output>9</output>

<result>9</result>