Baida supermarket opens at 8:00 in the morning and closes at 10:00 in the evening. How many hours does it operate in one day?
百大超市早上8：00开始营业，晚上10：00关门，一天共营业多少小时．
<gadget id="calculator">22 - 8</gadget>
<output>14</output>

<result>14</result>