On a map with a scale of 1:3000000, the distance between A and B is measured to be 10 centimeters. If it is drawn on a map with a scale of 1:5000000, how many centimeters should be drawn?
在比例尺1：3000000的地图上，量得甲乙两地的距离是10厘米，把它画在1：5000000的地图上，应该画多少厘米．
<gadget id="calculator">3_000_000 * 10</gadget>
<output>30_000_000</output>

<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">30_000_000 * (1/5_000_000)</gadget>
<output>6</output>

<result>6</result>