A car travels 540 kilometers in 6 hours, and a train travels 770 kilometers in 7 hours. How much more kilometers does the train travel per hour than the car?
一辆小汽车6小时行了540千米，一列火车7小时行了770千米，火车比汽车每小时多行多少千米？
<gadget id="calculator">770 / 7</gadget>
<output>110</output>

<gadget id="calculator">540 / 6</gadget>
<output>90</output>

<gadget id="calculator">110 - 90</gadget>
<output>20</output>

<result>20</result>