If a square with a perimeter of 24.4 cm is cut and complemented diagonally to form a parallelogram, what is its area?
一个周长是24.4厘米的正方形，把它沿对角线割补成一个平行四边形，它的面积是多少．
<gadget id="calculator">24.4 / 4</gadget>
<output>6.1</output>

<gadget id="calculator">6.1 * 6.1</gadget>
<output>37.21</output>

<result>37.21</result>