On a map with a scale of 1:5000000, the distance between AB and AB is 6 cm, and how many hours does it take for a car to travel from A to B at a speed of 75 kilometers per hour.
在比例尺是1：5000000的地图上，量得AB两地相距6厘米，一辆汽车以每小时75千米的速度，从A地到B地需要多少小时．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">6 / (1/5_000_000) / 100_000 / 75</gadget>
<output>4</output>

<result>4</result>