On a map with a scale of 1:5,000,000, A. The length of the road between the two cities is 4.8 cm. On another map with a scale of 1:4,000,000, how long is this road in centimeters?
在一幅比例尺是1：5000000的地图上，量得A．B两个城市之间的公路长4.8cm，在另一幅比例尺是1：4000000的地图上，这条公路长多少厘米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">4.8 / (1/5_000_000)</gadget>
<output>24_000_000</output>

<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">24_000_000 * (1/4_000_000)</gadget>
<output>6</output>

<result>6</result>