Kobayashi took the train to Beijing for fun. He departed at 19:00 on May 1 and arrived at 3:00 on May 3. How many hours did he pass on the way?
小林乘火车到北京游玩，5与1日19：00出发，5月3日凌晨3：00到达，途中经过了多少小时．
<gadget id="calculator">24 * 2</gadget>
<output>48</output>

<gadget id="calculator">19 - 3</gadget>
<output>16</output>

<gadget id="calculator">48 - 16</gadget>
<output>32</output>

<result>32</result>