On a map with a scale of 1:5,000,000, the distance from Jinhua to Hangzhou is measured as 4 cm. What is the actual distance from Jinhua to Hangzhou in kilometers?
在一张地图的比例尺1：5000000的地图上，量得金华到杭州的距离为4厘米，则金华到杭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">4 / (1/5_000_000) / 100_000</gadget>
<output>200</output>

<result>200</result>