A train departs at 16:00 and arrives at its destination at 5:00 the next morning. How many hours does it travel?
一列火车16时发车，第二天早晨5时到达目的地，它行驶了多少小时．
<gadget id="calculator">8 + 5</gadget>
<output>13</output>

<result>13</result>