On a map with a scale of 1:50,000, the distance between the two places is 40 cm. If it is on a map with a scale of 1:200,000, what is the distance between the two places?
在比例尺是1：50000的地图上量得两地间的距离是40厘米，如果在1：200000的地图上，这两地间的距离是多少？
<gadget id="calculator">1 / 50_000</gadget>
<output>1/50_000 = around 0.00002</output>

<gadget id="calculator">40 / (1/50_000)</gadget>
<output>2_000_000</output>

<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">2_000_000 * (1/200_000)</gadget>
<output>10</output>

<result>10</result>