On a map with a scale of 1:50000, the distance between A and B on the map is 3cm, so how many kilometers is the actual distance between the two places?
在比例尺是1：50000的地图上，A，B两地的图上距离是3cm，那么两地的实际距离是多少千米？
<gadget id="calculator">1 / 50_000</gadget>
<output>1/50_000 = around 0.00002</output>

<gadget id="calculator">3 / (1/50_000) / 100_000</gadget>
<output>3/2 = around 1.5</output>

<result>3/2 = around 1.5</result>