On the railway operation map with a scale of 1:12000000, the length of the railway between A and B is measured to be 3.6 cm, and it is drawn on the map with a scale of 1:4000000. What is the distance between A and B on the map? long?
在比例尺1：12000000的铁路运行图上，量得甲、乙两成间的铁路长3.6厘米，将它画在比例尺1：4000000的地图上，甲、乙两城之间的图上距离是多长？
<gadget id="calculator">1 / 12_000_000</gadget>
<output>1/12_000_000 = around 0</output>

<gadget id="calculator">3.6 / (1/12_000_000)</gadget>
<output>43_200_000</output>

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

<gadget id="calculator">43_200_000 * (1/4_000_000)</gadget>
<output>54/5 = around 10.8</output>

<result>54/5 = around 10.8</result>