The length of the rectangle is 5 cm and the width is 4 cm. If the length is the fixed axis and the rectangle is rotated once, a three-dimensional figure is obtained. What is the surface area of the three-dimensional figure?
长方形的长是5厘米，宽是4厘米，以长为固定轴把长方形旋转一周，所得一个立体图形，这个立体图形的表面积是多少．
<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">2 * 3.14 * 16</gadget>
<output>100.48</output>

<gadget id="calculator">2 * 3.14 * 4 * 5</gadget>
<output>125.6</output>

<gadget id="calculator">100.48 + 125.6</gadget>
<output>226.08</output>

<result>226.08</result>