On a map with a scale of 1:100,000, the distance between A and B is 2 cm. On a map with a scale of 1:250,000, what is the distance in cm between A and B?
在一幅比例尺1：100000的地图上，量得甲乙两地的距离为2cm，在比例尺1：250000的地图上，甲乙两地的距离是多少cm？
<gadget id="calculator">1 / 100_000</gadget>
<output>1/100_000 = around 0.00001</output>

<gadget id="calculator">2 / (1/100_000)</gadget>
<output>200_000</output>

<gadget id="calculator">1 / 250_000</gadget>
<output>1/250_000 = around 0.000004</output>

<gadget id="calculator">200_000 * (1/250_000)</gadget>
<output>4/5 = around 0.8</output>

<result>4/5 = around 0.8</result>