A square lawn has a perimeter of 124m, what is its area in square meters?
一块正方形草坪，周长124m，它的面积是多少平方米？
<gadget id="calculator">124 / 4</gadget>
<output>31</output>

<gadget id="calculator">31 * 31</gadget>
<output>961</output>

<result>961</result>