On a map with a scale of (1/7500000), the distance from Nanjing to Beijing is measured as 12 centimeters. If the plane flies from Nanjing to Beijing at a speed of 720 kilometers per hour, how many hours will it take?
在比例尺是(1/7500000)的地图上，量得南京到北京的距离是12厘米，如果飞机以每小时720千米的速度从南京飞到北京要用多少小时？
<gadget id="calculator">1 / 7_500_000</gadget>
<output>1/7_500_000 = around 0</output>

<gadget id="calculator">12 / (1/7_500_000) / 100_000 / 720</gadget>
<output>5/4 = around 1.25</output>

<result>5/4 = around 1.25</result>