On a map with a scale of 1:2000000, the actual distance from City A to Yicheng City is 450 kilometers. What is the distance between City A and City B on the map?
在一幅比例尺是1：2000000的地图上，甲城市到宜城市的实际距离是450千米，甲城市到乙城市的图上距离是多少．
<gadget id="calculator">1 / 2_000_000</gadget>
<output>1/2_000_000 = around 0</output>

<gadget id="calculator">450 * 100_000 * (1/2_000_000)</gadget>
<output>45/2 = around 22.5</output>

<result>45/2 = around 22.5</result>