The distance between A and B is 8 kilometers, how many centimeters should be drawn on a map with a scale of 1:400000.
A、B两地相距8千米，在比例尺是1：400000的地图上应画多少厘米．
<gadget id="calculator">1 / 400_000</gadget>
<output>1/400_000 = around 0.000002</output>

<gadget id="calculator">8 * 100_000 * (1/400_000)</gadget>
<output>2</output>

<result>2</result>