On a map with a scale of 1:20,000,000, the distance between A and B is 12 cm. If A and B are drawn on another map with a scale of 1:60,000,000, what is the distance in centimeters between the two places on the map?
在一幅比例尺是1：20,000,000的地图上，量得A，B两地之间的距离是12厘米．如果把A，B两地画在另一幅比例尺是1：60,000,000的地图上，两地间的图上距离是多少厘米？
<gadget id="calculator">1 / 20_000_000</gadget>
<output>1/20_000_000 = around 0</output>

<gadget id="calculator">12 / (1/20_000_000)</gadget>
<output>240_000_000</output>

<gadget id="calculator">1 / 60_000_000</gadget>
<output>1/60_000_000 = around 0</output>

<gadget id="calculator">240_000_000 * (1/60_000_000)</gadget>
<output>4</output>

<result>4</result>