On a map with a scale of 1:2500000, the distance between A and B is 7.2 cm. How many hours does it take for a car to travel 80 kilometers per hour from city A to city B?
在比例尺是1：2500000的地图上，量得甲乙两城之间的距离是7.2厘米．一辆汽车从甲城到乙城，每小时行80千米，需要多少小时？
<gadget id="calculator">1 / 2_500_000</gadget>
<output>1/2_500_000 = around 0</output>

<gadget id="calculator">7.2 / (1/2_500_000) / 100_000 / 80</gadget>
<output>2.25</output>

<result>2.25</result>