Scale bar 1: 2000000 means that the distance of 1 cm on the map is equivalent to the actual distance in kilometers on the ground.
比例尺1：2000000表示地图上1厘米的距离相当于地面上多少千米的实际距离．
<gadget id="calculator">2_000_000 / 1 / 100_000</gadget>
<output>20</output>

<result>20</result>