A cylindrical biscuit box, its side area is a square when expanded, the perimeter of the bottom of the biscuit box is known to be 25.12 cm, what is the surface area of the biscuit box in square centimeters?
一个圆柱形的饼干盒，它的侧面积展开后是一个正方形，已知饼干盒的底面周长是25.12厘米，这个饼干盒的表面积是多少平方厘米？
<gadget id="calculator">25.12 * 25.12</gadget>
<output>631.0144</output>

<gadget id="calculator">25.12 / 3.14 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

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

<gadget id="calculator">631.0144 + 100.48</gadget>
<output>731.4944</output>

<result>731.4944</result>