Divide a circle into 16 equal parts and form an approximate rectangle. The perimeter of the approximate rectangle is 16 cm longer than the perimeter of the circle. What is the area of the circle in square centimeters?
把一个圆等分成16份，拼成一个近似的长方形，近似的长方形周长比圆的周长增加16厘米，圆的面积是多少平方厘米？
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64</gadget>
<output>200.96</output>

<result>200.96</result>