The actual distance between A and B is 12km, drawn on a map with a scale of 1:200000, what is the distance in cm on the map.
甲乙两地实际距离12km，画在一幅比例尺是1：200000的地图上，图上距离是多少cm．
<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">12 * 100_000 * (1/200_000)</gadget>
<output>6</output>

<result>6</result>