On a 1:8000000 map, the distance between the two cities is 18 centimeters. If the plane flies an average of 720 kilometers per hour, how many hours will it take to fly between the two cities?
在一幅1：8000000的地图上量得两个城市的距离是18厘米，如果飞机平均每小时飞行720千米，在这两个城市间大约要飞行多少小时？
<gadget id="calculator">1 / 8_000_000</gadget>
<output>1/8_000_000 = around 0</output>

<gadget id="calculator">18 / (1/8_000_000) / 100_000 / 720</gadget>
<output>2</output>

<result>2</result>