On a map with a scale of 1:500,000, the measured length from Ruian to Hangzhou is about 54 centimeters. What is the actual distance between Ruian and Hangzhou?
在比例尺是1：500000的地图上，量得瑞安至杭州的长度大约是54厘米．瑞安至杭州的实际距离是多少千米？
<gadget id="calculator">1 / 500_000</gadget>
<output>1/500_000 = around 0.000002</output>

<gadget id="calculator">54 / (1/500_000) / 100_000</gadget>
<output>270</output>

<result>270</result>