The distance between the two places measured on a map with a scale of (1/1000000) is 2.5 cm, what is the actual distance in kilometers between the two places?
在比例尺是(1/1000000)的地图上量得两地之间的距离是2.5厘米，两地实际距离是多少千米．
<gadget id="calculator">1 / 1_000_000</gadget>
<output>1/1_000_000 = around 0.000001</output>

<gadget id="calculator">2.5 / (1/1_000_000) / 100_000</gadget>
<output>25</output>

<result>25</result>