A rectangular experimental field, on a map with a scale of 1:2000, has a length of 2.5 cm and a width of 1.5 cm. Find the actual area of the experimental field.
一块长方形试验田，在比例尺是1：2000的地图上，长是2.5厘米，宽是1.5厘米，求这块试验田的实际面积．
<gadget id="calculator">1 / 2_000</gadget>
<output>1/2_000 = around 0.0005</output>

<gadget id="calculator">2.5 / (1/2_000) / 100</gadget>
<output>50</output>

<gadget id="calculator">1.5 / (1/2_000) / 100</gadget>
<output>30</output>

<gadget id="calculator">50 * 30</gadget>
<output>1_500</output>

<result>1_500</result>