The scale of a map is 1:3,000,000. It is known that the actual distance between A and B is 600 kilometers. How many centimeters should it be on this map?
一幅地图的比例尺是1：3000000，已知甲乙两地实际距离是600千米，在这幅地图上应是多少厘米．
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">600 * 100_000 * (1/3_000_000)</gadget>
<output>20</output>

<result>20</result>