On a map with a scale of (1/500000), how many centimeters are drawn on the map to represent the actual distance of 30 kilometers.
在比例尺是(1/500000)的地图上，在图上画多少厘米表示实际距离30千米．
<gadget id="calculator">1 / 500_000</gadget>
<output>1/500_000 = around 0.000002</output>

<gadget id="calculator">30 * 100_000 * (1/500_000)</gadget>
<output>6</output>

<result>6</result>