On a map with a scale of 1:4000000, the distance between A and B is 6 cm. How many hours does it take for a car to drive from point A to point B at a speed of 80 kilometers per hour?
在一幅比例尺是1：4000000的地图上，量得甲乙两地的距离是6厘米．一辆汽车以每小时80千米的速度从甲地开往乙地，需要几小时？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">6 / (1/4_000_000) / 100_000 / 80</gadget>
<output>3</output>

<result>3</result>