my country's "Shenzhou V" manned spacecraft landed on Siziwang Banner in Inner Mongolia. On a map with a scale of 1:15,000,000, the distance between Siziwang Banner and Beijing is measured to be 3 centimeters. How many kilometers is the actual distance between the two places?
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1：15000000的地图上，量得四子王旗与北京的距离是3厘米，这两地之间的实际距离大约是多少千米？
<gadget id="calculator">1 / 15_000_000</gadget>
<output>1/15_000_000 = around 0</output>

<gadget id="calculator">3 / (1/15_000_000) / 100_000</gadget>
<output>450</output>

<result>450</result>