On a map, the distance between Beijing and Shanghai is 2.7 cm. The scale of this map is (1:50000000). What is the actual distance between Beijing and Shanghai in kilometers?
在一幅地图上，北京到上海的距离是2.7厘米，这幅图的比例尺是(1：50000000)，北京到上海的实际距离是多少千米．
<gadget id="calculator">1 / 50_000_000</gadget>
<output>1/50_000_000 = around 0</output>

<gadget id="calculator">2.7 / (1/50_000_000) / 100_000</gadget>
<output>1_350</output>

<result>1_350</result>