Draw the largest circle in a square with a perimeter of 24 cm, what is the area in square meters?
在周长是24厘米的正方形内画一个最大的圆，其面积是多少平方米．
<gadget id="calculator">24 / 4 / 2</gadget>
<output>3</output>

<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9</gadget>
<output>28.26</output>

<result>28.26</result>