The distance between the two cities is 1800 kilometers. The train leaves at 20:30 and arrives at 5:30 the next morning. How many kilometers does the train travel per hour?
两个城市之间相距1800千米，火车20：30开出，第二天早晨5：30到达，火车每小时行多少千米？
<gadget id="calculator">1_800 / 9</gadget>
<output>200</output>

<result>200</result>