Cut the largest circle out of a square piece of paper with an area of 64 square centimeters. What is the area of this circle?
在一个面积为64平方厘米的正方形纸片内剪下一个最大的圆，这个圆的面积是多少？
<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<result>50.24</result>