If the perimeter of a square is 2000 meters, what is the area of the square?
一个正方形的周长是2000米，这个正方形的面积是多少公顷．
<gadget id="calculator">2_000 / 4</gadget>
<output>500</output>

<gadget id="calculator">2_000 / 4 / 10_000</gadget>
<output>1/20 = around 0.05</output>

<gadget id="calculator">500 * (1/20)</gadget>
<output>25</output>

<result>25</result>