Scale 1: 2000000 means that the distance on the map is the actual distance ((())/(())), and the actual distance is how many times the distance on the map.
比例尺1：2000000表示图上距离是实际距离的((())/(()))，实际距离是图上距离的多少倍．
<gadget id="calculator">2_000_000 / 1 / 1</gadget>
<output>2_000_000</output>

<gadget id="calculator">2_000_000 / 1</gadget>
<output>2_000_000</output>

<result>2_000_000</result>