On a map with a scale of 1:500,000, the distance between A and B is 3.2 cm. How many hours does it take for a car to drive from A to B at a speed of 80 kilometers per hour?
在一幅比例尺为1：500000的地图上量得A、B两地之间的距离为3.2厘米，一辆汽车以每小时80千米的速度由A地开向B地需要多少小时？
<gadget id="calculator">1 / 500_000</gadget>
<output>1/500_000 = around 0.000002</output>

<gadget id="calculator">3.2 / (1/500_000) / 100_000 / 80</gadget>
<output>0.2</output>

<result>0.2</result>