The distance between the two cities of AB and AB measured on a map with a scale of 1:5000000 is 5.2 cm. What is the actual distance between the two cities of AB in kilometers?
比例尺是1：5000000的地图上量得AB两城市相距是5.2厘米，AB两城市的实际距离是多少千米．
<gadget id="calculator">1 / 5_000_000</gadget>
<output>1/5_000_000 = around 0</output>

<gadget id="calculator">5.2 / (1/5_000_000) / 100_000</gadget>
<output>260</output>

<result>260</result>