On the bus route map of a certain city, the actual distance of bus No. 2 from the train station to the terminal station is 20 kilometers. It is known that the scale of this picture is 1:50000, and the distance on the map from the train station to the terminal station is how many centimeters?
在某城市的公交路线图上，2路公交车从火车站到终点站的实际距离是20千米，已知这幅图的比例尺是1：50000，从火车站到终点站的图上距离是多少厘米？
<gadget id="calculator">1 / 50_000</gadget>
<output>1/50_000 = around 0.00002</output>

<gadget id="calculator">20 * 100_000 * (1/50_000)</gadget>
<output>40</output>

<result>40</result>