On a map with a scale of 1:200,000, the distance from point A to point B is 15 centimeters. How many kilometers is the actual distance from point A to point B?
在比例尺是1：200000的图上量得甲地到乙地的距离是15厘米，甲地到乙地的实际距离是多少千米？
<gadget id="calculator">1 / 200_000</gadget>
<output>1/200_000 = around 0.000005</output>

<gadget id="calculator">15 / (1/200_000)</gadget>
<output>3_000_000</output>

<gadget id="calculator">3_000_000 / 100_000</gadget>
<output>30</output>

<result>30</result>