An airplane flies 480 kilometers per hour, which is 200 kilometers more than twice the speed of a train. How many miles does a train travel per hour?
一架飞机每小时飞行480千米，比一列火车速度的2倍多200千米．一列火车每小时行多少千米？
<gadget id="calculator">480 - 200</gadget>
<output>280</output>

<gadget id="calculator">280 / 2</gadget>
<output>140</output>

<result>140</result>