my country's "Shenzhou V" manned spacecraft landed on Siziwang Banner in Inner Mongolia. On a map with a scale of 1:5,000,000, the distance between Siziwang Banner and Beijing is 9 centimeters. What is the actual distance between Siziwang Banner and Beijing?
我国"神舟五号"载人飞船着陆在内蒙古的四子王旗．在一幅比例尺是1：5000000的地图上，量得四子王旗与北京的距离是9厘米．四子王旗与北京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">9 / (1/5_000_000) / 100_000</gadget>
<output>450</output>

<result>450</result>