A train departs from Changsha at 9:00 p.m. and arrives in Beijing on time at 8:00 a.m. the next day. How long does it take?
一列火车晚上9时从长沙出发，第二天早上8点准时到达北京，中途行驶了多长的时间？
<gadget id="calculator">3 + 8</gadget>
<output>11</output>

<result>11</result>