On a map of China with a scale of 1:3,000,000, the distance from Ruijin to Changting is measured as 1.4 centimeters. How many kilometers is it actually?
在比例尺是1：3000000的中国地图上，量得瑞金到长汀的距离为1.4厘米，实际大约多少千米．
<gadget id="calculator">1 / 3_000_000</gadget>
<output>1/3_000_000 = around 0</output>

<gadget id="calculator">1.4 / (1/3_000_000) / 100_000</gadget>
<output>42</output>

<result>42</result>