On a map with a scale of 1:5,000,000, the distance from Dingxi to Lanzhou is 8cm. How many kilometers is the actual distance from Dingxi to Lanzhou?
在比例尺是1：5000000的地图上，量得定西到兰州的距离是8cm，算一算定西到兰州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">8 / (1/5_000_000) / 100_000</gadget>
<output>400</output>

<result>400</result>