On a drawing with a scale of 1:40000, how many cm should be drawn for 3.2 km.
在比例尺为1：40000的图纸上，3.2km应画多少cm．
<gadget id="calculator">1 / 40_000</gadget>
<output>1/40_000 = around 0.000025</output>

<gadget id="calculator">3.2 * 100_000 * (1/40_000)</gadget>
<output>8</output>

<result>8</result>