On a map with a scale of 1:50,000, the distance from Xiaojiang's home to the school is 3 centimeters, how many kilometers should the actual distance be?
在一幅比例尺为1：50000的地图上，小江家到学校的距离是3厘米，实际路程应该是多少千米．
<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>