On a Chinese map, a distance of 3 centimeters is used to represent the actual distance of 180 kilometers. On this map, the distance from city A to city B is 4.5 centimeters. So how many kilometers is the actual distance from city A to city B?
在一幅中国地图上用3厘米的距离表示实际距离180千米，在这幅地图上量得甲城到乙城的距离是4.5厘米，那么甲城到乙城的实际距离是多少千米？
<gadget id="calculator">180 * 100_000</gadget>
<output>18_000_000</output>

<gadget id="calculator">3 / 18_000_000</gadget>
<output>1/6_000_000 = around 0</output>

<gadget id="calculator">4.5 / (1/6_000_000) / 100_000</gadget>
<output>270</output>

<result>270</result>