On a map with a scale of 1:600000, which represents a distance of 72 kilometers, how many centimeters should be drawn on the map.
在一幅比例尺为1：600000的地图上，表示72千米的距离，地图上应画多少厘米．
<gadget id="calculator">1 / 600_000</gadget>
<output>1/600_000 = around 0.000002</output>

<gadget id="calculator">72 * 100_000 * (1/600_000)</gadget>
<output>12</output>

<result>12</result>