On a map with a scale of 1:45000000, the measured distance between A and B is 2.7 cm. What is the actual distance between A and B in kilometers?
在一幅比例尺是1：45000000的地图上，量得甲乙两地的距离是2.7厘米，甲乙两地的实际距离是多少千米．
<gadget id="calculator">1 / 45_000_000</gadget>
<output>1/45_000_000 = around 0</output>

<gadget id="calculator">2.7 / (1/45_000_000) / 100_000</gadget>
<output>1_215</output>

<result>1_215</result>