Before setting off, Xiaolin measured the distance from Jinzhou to B on a map with a scale of (1/5000000) as 12 centimeters. What is the actual distance in kilometers?
出发前，小林在一幅比例尺为(1/5000000)的地图上，量得锦州到B地的距离是12厘米，实际距离应该是多少千米．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">12 / (1/5_000_000) / 100_000</gadget>
<output>600</output>

<result>600</result>