A car travels 60 kilometers per hour from point A to point B and takes 5 hours to arrive. How many miles per hour does the car need to travel if it arrives 1 hour earlier?
一辆汽车从甲地到乙地，每小时进行60千米，5小时到达．如果提前1小时到达，这辆汽车每小时需要多行多少千米？
<gadget id="calculator">5 - 1</gadget>
<output>4</output>

<gadget id="calculator">5 / 4</gadget>
<output>5/4 = around 1.25</output>

<gadget id="calculator">60 * (5/4)</gadget>
<output>75</output>

<gadget id="calculator">75 - 60</gadget>
<output>15</output>

<result>15</result>