Expanding the side of a cylinder is exactly a square. It is known that the base area of the cylinder is 5 square centimeters. What is the surface area of the cylinder?
把一个圆柱的侧面展开正好是一个正方形，已知圆柱的底面积是5平方厘米，这个圆柱的表面积是多少？
<gadget id="calculator">5 * 2</gadget>
<output>10</output>

<gadget id="calculator">20 * 3.14</gadget>
<output>62.8</output>

<gadget id="calculator">10 + 62.8</gadget>
<output>72.8</output>

<result>72.8</result>