A bridge is 20 kilometers long. On a map with a scale of 1:100000, what is its length in centimeters?
一座大桥全长20千米，在一幅比例尺是1：100000的地图上，它的长度是多少厘米？
<gadget id="calculator">1 / 100_000</gadget>
<output>1/100_000 = around 0.00001</output>

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

<result>20</result>