The actual distance between A and B is 30 kilometers. On a map with a scale of 1:500000, what is the distance in centimeters?
甲乙两地的实际距离是30千米，在比例尺为1：500000的地图上，距离为多少厘米．
<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>