On a 1:4,000,000 map, the distance between the highways between A and B is 18 cm. On another 1:6000000 map, what is the distance in centimeters on the map of this road?
在一幅1：4000000的地图上，量得甲、乙两个城市之间的高速公路的距离是18厘米．在另一幅1：6000000的地图上，这条公路的图上距离是多少厘米？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">18 / (1/4_000_000)</gadget>
<output>72_000_000</output>

<gadget id="calculator">1 / 6_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">72_000_000 * (1/6_000_000)</gadget>
<output>12</output>

<result>12</result>