On a map with a scale of 1:200,000, the distance between the two places is measured to be 30 centimeters. How many kilometers is the actual distance between the two places?
在比例尺是1：200000的地图上，量得两地距离是30厘米，这两地的实际距离是多少千米？
<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">30 / (1/200_000) / 100_000</gadget>
<output>60</output>

<result>60</result>