A car travels 40 kilometers per hour from place A to place B, and it takes 9 hours to get there; if you want to complete the journey 1 hour earlier, how many kilometers does it need to travel per hour? (Solve with ratio)
一辆汽车从甲地开往乙地，每小时行40千米，9小时可以到达；如果要提前1小时行完全程，每小时需要行多少千米？(用比例解)
<gadget id="calculator">40 * 9</gadget>
<output>360</output>

<gadget id="calculator">9 - 1</gadget>
<output>8</output>

<gadget id="calculator">360 / 8</gadget>
<output>45</output>

<result>45</result>