On a map with a scale of (1/5000000), the measured distance on the map from Jiangle to Sanming is 2.8 centimeters, how many kilometers is it actually from Jiangle to Sanming?
在一幅比例尺是(1/5000000)的地图上，量得将乐至三明的图上距离是2.8厘米，将乐至三明实际有多少千米．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">2.8 / (1/5_000_000) / 100_000</gadget>
<output>140</output>

<result>140</result>