A truck travels from point A to point B at 45 kilometers per hour and takes 5 hours to arrive. If it takes 3 hours to get there, how many kilometers do you need to travel per hour?
一辆卡车从A地开往B地，每小时行45千米，要5小时到达．如果要3小时到达，每小时要多行多少千米？
<gadget id="calculator">5 / 3</gadget>
<output>5/3 = around 1.666667</output>

<gadget id="calculator">45 * (5/3)</gadget>
<output>75</output>

<result>75</result>