On a map with a scale of 1:500,000, the distance between A and B is 6 cm. If it is measured on a map with a scale of 1:200,000, how many centimeters is the distance between A and B?
在比例尺是1：500000的地图上量得A、B两地的距离是6cm，若在比例尺是1：200000的地图上，A、B两地的距离是多少厘米？
<gadget id="calculator">1 / 500_000</gadget>
<output>1/500_000 = around 0.000002</output>

<gadget id="calculator">6 / (1/500_000)</gadget>
<output>3_000_000</output>

<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">3_000_000 * (1/200_000)</gadget>
<output>15</output>

<result>15</result>