On a map with a scale of 1:4000000, the distance between A and B is measured to be 12 cm. If it is drawn on a map with a scale of 1:3000000, how many centimeters should be drawn?
在比例尺是1：4000000的地图上，量得甲乙两地的图上距离是12cm，把它画在比例尺是1：3000000的地图上，应画多少厘米？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">12 / (1/4_000_000)</gadget>
<output>48_000_000</output>

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

<gadget id="calculator">48_000_000 * (1/3_000_000)</gadget>
<output>16</output>

<result>16</result>