A train departs from Fuzhou at 10:30 am and arrives at Longyan at 1:30 pm that day. How many hours will it take on the way?
一列火车上午10：30从福州出发，当天下午1：30到达龙岩，途中共用去多少小时．
<gadget id="calculator">30 / 10</gadget>
<output>3</output>

<result>3</result>