The distance from Xiao Wang's house to the school is 3 kilometers, how much should be drawn on the map according to the scale of 1:2000.
小王家到学校的距离是3千米，按1：2000的比例尺画在图上，应画多少．
<gadget id="calculator">1 / 2_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">(1/2_000) / 10</gadget>
<output>1/20_000 = around 0.00005</output>

<gadget id="calculator">3 * 100_000 * (1/20_000)</gadget>
<output>15</output>

<result>15</result>