An airplane flies 480 kilometers per hour, 60 kilometers more than 7 times the speed of a train. How many miles does the train travel per hour? (solution by equation)
一架飞机每小时飞行480千米，比一列火车速度的7倍还多60千米．火车每小时行多少千米？(用方程解)
<gadget id="calculator">480 - 60</gadget>
<output>420</output>

<gadget id="calculator">420 / 7</gadget>
<output>60</output>

<result>60</result>