The scale of a map is 1:36000000, and the distance between A and B on the map is 12 cm. What is the actual distance between A and B in kilometers?
一幅地图的比例尺是1：36000000，A、B两地地图上距离是12厘米，则A、B两地的实际距离是多少千米．
<gadget id="calculator">1 / 36_000_000</gadget>
<output>1/36_000_000 = around 0</output>

<gadget id="calculator">12 / (1/36_000_000) / 100_000</gadget>
<output>4_320</output>

<result>4_320</result>