On a plan with a scale of 1:50000, the length of an avenue is measured to be 10 cm. What is the actual length of the avenue in kilometers?
在比例尺为1：50000的平面图上，量得一条大道的长度是10厘米，这条大道的实际长度是多少千米．
<gadget id="calculator">1 / 50_000</gadget>
<output>1/50_000 = around 0.00002</output>

<gadget id="calculator">10 / (1/50_000) / 100_000</gadget>
<output>5</output>

<result>5</result>