Draw the largest circle in a square. The area of the circle is 28.26 square meters. What is the area of the square in square meters?
在一个正方形中画一个最大的圆，已知圆的面积为28.26平方米，正方形的面积是多少平方米．
<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">6 * 6</gadget>
<output>36</output>

<result>36</result>