On a map with a scale of 1:5000000, the distance between A and B is 2.4 cm; on another map with a scale of 1:3000000, how many centimeters is the distance between A and B?
在比例尺是1﹕5000000的地图上，量得甲、乙两地间的距离是2.4厘米；在另一幅比例尺是1﹕3000000的地图上，甲、乙两地间的距离是多少厘米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">2.4 / (1/5_000_000)</gadget>
<output>12_000_000</output>

<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">12_000_000 * (1/3_000_000)</gadget>
<output>4</output>

<result>4</result>