The distance between A and B is 4.5cm measured on a map with a scale of 1:4000000. If it is drawn on a map with a scale of 1:2500000, how many cm should be drawn?
在一幅比例尺为1：4000000的地图上测得甲、乙两地之间的距离是4.5cm，如果画在比例尺为1：2500000的图纸上，应画多少cm？
<gadget id="calculator">1 / 4_000_000</gadget>
<output>1/4_000_000 = around 0</output>

<gadget id="calculator">4.5 / (1/4_000_000)</gadget>
<output>18_000_000</output>

<gadget id="calculator">1 / 2_500_000</gadget>
<output>1/2_500_000 = around 0</output>

<gadget id="calculator">18_000_000 * (1/2_500_000)</gadget>
<output>36/5 = around 7.2</output>

<result>36/5 = around 7.2</result>