On a map with a scale of (1/5000000), the distance between City A and City B on the map is 2 cm. How many kilometers is the actual length between City A and City B?
在一幅比列尺是(1/5000000)的地图上，量得甲市到乙市的图上距离是2厘米，甲市至乙市实际长多少千米．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">2 / (1/5_000_000) / 100_000</gadget>
<output>100</output>

<result>100</result>