A rope can enclose a rectangle with a length of 12 meters and a width of 8 meters. If this rope is used to form a square, what is the area of the square in square meters?
一条绳子可围成长12米，宽8米的长方形，如果用这条绳子围成一个正方形，那么这个正方形的面积是多少平方米？
<gadget id="calculator">12 + 8</gadget>
<output>20</output>

<gadget id="calculator">2 / 4</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">20 * (1/2)</gadget>
<output>10</output>

<gadget id="calculator">10 * 10</gadget>
<output>100</output>

<result>100</result>