The distance between A and B is 120 kilometers. On a map with a scale of (1/3000000), how many centimeters should this distance be drawn?
甲、乙两地之间的距离是120千米，在比例尺是(1/3000000)的地图上，这段距离应该画多少厘米．
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">120 * 100_000 * (1/3_000_000)</gadget>
<output>4</output>

<result>4</result>