A car travels 40 kilometers per hour from point A to point B and takes 6 hours to arrive. If it takes 4 hours to arrive, how many kilometers per hour do you need to travel?
一辆汽车从甲地开往乙地，每小时行40千米，需6小时到达．如果要4小时到达，每小时要行多少千米？
<gadget id="calculator">6 / 4</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">40 * (3/2)</gadget>
<output>60</output>

<result>60</result>