On a map with a scale of 1:200000, the distance between A and B is 6 cm. If A and B are drawn on a map with a scale of 1:300000, what is the distance in centimeters between A and B?
在比例尺是1：200000的地图上，量得甲、乙两地间的距离是6厘米．如果把甲、乙两地画在比例尺是1：300000的地图上，甲、乙两地间的距离是多少厘米？
<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">6 / (1/200_000)</gadget>
<output>1_200_000</output>

<gadget id="calculator">1 / 300_000</gadget>
<output>1/300_000 = around 0.000003</output>

<gadget id="calculator">1_200_000 * (1/300_000)</gadget>
<output>4</output>

<result>4</result>