Xiaohua divides a circle into several equal parts along the radius, and puts them together to form an approximate rectangle. The perimeter of this rectangle is measured to be 41.4 cm. What is the area of this rectangle?
小华把一个圆沿半径平分成若干份，拼成一个近似长方形，量得这个长方形的周长是41.4厘米，那么这个长方形的面积是多少？
<gadget id="calculator">2 * 3.14</gadget>
<output>6.28</output>

<gadget id="calculator">6.28 + 2</gadget>
<output>8.28</output>

<gadget id="calculator">41.4 / 8.28</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">3.14 * 25</gadget>
<output>78.5</output>

<result>78.5</result>