When deriving the formula for the area of a circle, divide the circle into several equal parts and put together an approximate rectangle. It is known that the perimeter of the rectangle is 33.12 cm. What is the area of the circle in square centimeters?
在推导圆的面积公式时，将圆等分成若干份，拼成一个近似的长方形，已知长方形的周长是33.12厘米，则圆的面积是多少平方厘米？
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<result>50.24</result>