The distance between A and B is 450km. On a map with a scale of 1:2000000, what is the distance in cm between the two places?
甲、乙两地相距450km，在比例尺是1：2000000的地图上两地相距多少cm．
<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>