Roll a square iron sheet with a side length of 62.8 cm into a cylinder (not counting the joints), and make a bottom and a cover for it so that they just cover the cylinder. What is the surface area of the finished cylindrical cylinder? centimeter?
把一张边长是62.8厘米的正方形铁皮卷成一个圆筒(不计接头)，并为它制作底和盖，使它们正好盖住圆筒，做好的这个圆柱形圆筒的表面积是多少平方厘米？
<gadget id="calculator">62.8 / 3.14 / 2</gadget>
<output>10</output>

<gadget id="calculator">10 ** 2</gadget>
<output>100</output>

<gadget id="calculator">3.14 * 100 * 2</gadget>
<output>628</output>

<gadget id="calculator">62.8 * 62.8</gadget>
<output>3_943.84</output>

<gadget id="calculator">628 + 3_943.84</gadget>
<output>4_571.84</output>

<result>4_571.84</result>