The scale of a map is 1:5,000,000, which means that 1 cm on the map is equivalent to the actual distance.
一幅地图的比例尺是1：5000000，表示图上的1厘米相当于实际距离的多少．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">1 / (1/5_000_000) / 100_000</gadget>
<output>50</output>

<result>50</result>