On a map with a scale of 1:20000000, the distance between A and B is 6 cm. If A and B are drawn on a map with a scale of (1/30000000). How many centimeters should be drawn.
在比例尺度1：20000000的地图上，A、B两地相距6厘米．如果把A、B两地画在一幅比例尺是(1/30000000)的地图上．应画多少厘米．
<gadget id="calculator">1 / 20_000_000</gadget>
<output>1/20_000_000 = around 0</output>

<gadget id="calculator">6 / (1/20_000_000)</gadget>
<output>120_000_000</output>

<gadget id="calculator">1 / 30_000_000</gadget>
<output>1/30_000_000 = around 0</output>

<gadget id="calculator">120_000_000 * (1/30_000_000)</gadget>
<output>4</output>

<result>4</result>