On a map with a scale of 1:4500000, the distance between the two cities is 6 cm. What is the actual distance between the two cities?
在一张比例尺是1：4500000的地图上，量得两城的距离是6厘米，两城之间的实际距离是多少．
<gadget id="calculator">1 / 4_500_000</gadget>
<output>1/4_500_000 = around 0</output>

<gadget id="calculator">6 / (1/4_500_000) / 100_000</gadget>
<output>270</output>

<result>270</result>