On a map with a scale of 1:200,000, the distance between city A and city B is 5 cm. How many kilometers are the actual distance between the two cities?
在比例尺为1：200000的一幅地图上，A城和B城相距5厘米，两城实际相距多少千米？
<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">5 / (1/200_000) / 100_000</gadget>
<output>10</output>

<result>10</result>