There is a train that has to travel 540 kilometers, and it is planned to travel 60 kilometers per hour; it actually arrives 3 hours ahead of schedule, how many kilometers does it actually travel per hour?
有一列火车要行驶540千米的路程，计划每小时行60千米；实际提前了3小时到达，实际每小时行多少千米？
<gadget id="calculator">540 / 60</gadget>
<output>9</output>

<gadget id="calculator">9 - 3</gadget>
<output>6</output>

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

<result>90</result>