The scale of a map is 1:20000, the distance from A to B is 60 kilometers, how many centimeters is the distance on the map?
一张地图的经例尺是1：20000，从甲地到乙地的距离是60千米，求图上距离是多少厘米？
<gadget id="calculator">1 / 20_000</gadget>
<output>1/20_000 = around 0.00005</output>

<gadget id="calculator">60 * 100_000 * (1/20_000)</gadget>
<output>300</output>

<result>300</result>