The distance between A and B is 420 kilometers. How many centimeters should be drawn on a map with a scale of 1:3,000,000?
A、B两地间相距420千米，画在一幅比例尺为1：3000000的地图上，应画几厘米？
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">420 * 100_000 * (1/3_000_000)</gadget>
<output>14</output>

<result>14</result>