On a scale (1/2500000) map, the distance between the two cities is measured to be 8 centimeters. If it is drawn on a scale (1/8000000) map, what is the distance in centimeters on the map?
在比例尺(1/2500000)的地图上，量得两城市间的距离是8厘米，如画在比例尺(1/8000000)的地图上，图上距离是多少厘米．
<gadget id="calculator">1 / 2_500_000</gadget>
<output>1/2_500_000 = around 0</output>

<gadget id="calculator">8 / (1/2_500_000)</gadget>
<output>20_000_000</output>

<gadget id="calculator">1 / 8_000_000</gadget>
<output>1/8_000_000 = around 0</output>

<gadget id="calculator">20_000_000 * (1/8_000_000)</gadget>
<output>5/2 = around 2.5</output>

<result>5/2 = around 2.5</result>