36 students hold hands and form a circle to play games. If the distance between two people facing each other is 8 meters, what is the area of the circle in square meters?
36个同学手拉手围成圆圈做游戏，如果正面相对的两人之间的距离是8米，围成的圆圈的面积是多少平方米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<result>50.24</result>