On a map with a scale of 1:200,000, the distance from Xujiahui Weather Station to People's Square is about 3 cm, so what is the actual distance in kilometers between these two places?
在比例尺是1：200000的地图上，量得徐家汇气象站到人民广场的距离约是3厘米，那么这两地之间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">3 / (1/200_000) / 100_000</gadget>
<output>6</output>

<result>6</result>