The scale of a picture is 1:2000000, what is the actual distance represented by 2cm on the map
一幅图的比例尺是1：2000000，在地图上2cm表示的实际距离是多少
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">2 / (1/2_000_000) / 100_000</gadget>
<output>40</output>

<result>40</result>