On a map with a scale of 1:5,000,000, the distance from Zhengzhou to Xi'an is 1.4cm. What is the actual distance between Zhengzhou and Xi'an?
在一幅比例尺是1：5000000的地图上，量得郑州到西安的距离是1.4cm．郑州到西安的实际距离是多少千米？
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">1.4 / (1/5_000_000) / 100_000</gadget>
<output>70</output>

<result>70</result>