The length of the railway between A and B is 1200 kilometers. On a map with a scale of 1:200000000, how many centimeters is the length of this railway?
A、B两地的铁路长1200千米，在一幅比例尺1：200000000的地图上，这条铁路长多少厘米？
<gadget id="calculator">1 / 200_000_000</gadget>
<output>1/200_000_000 = around 0</output>

<gadget id="calculator">1_200 * 100_000 * (1/200_000_000)</gadget>
<output>3/5 = around 0.6</output>

<result>3/5 = around 0.6</result>