An airplane flies 860 kilometers per hour, which is 20 kilometers more than six times that of a train per hour. How many kilometers per hour does the train travel?
一架飞机每小时飞行860千米，比一列火车每小时行驶的6倍还多20千米．这列火车每小时行多少千米？
<gadget id="calculator">860 - 20</gadget>
<output>840</output>

<gadget id="calculator">840 / 6</gadget>
<output>140</output>

<result>140</result>