An airplane travels 1800 kilometers per hour, which is 9 times the speed of a train. How many kilometers per hour does the train travel?
一架飞机每小时行1800千米，是火车速度的9倍，火车每小时行多少千米？
<gadget id="calculator">1_800 / 9</gadget>
<output>200</output>

<result>200</result>