When the lateral area of a cylinder is expanded, it is a square with a side length of 15.7 cm. What is the surface area of this cylinder in square centimeters?
一个圆柱的侧面积展开后是一个边长15.7cm的正方形．这个圆柱的表面积是多少平方厘米？
<gadget id="calculator">15.7 * 15.7</gadget>
<output>246.49</output>

<gadget id="calculator">15.7 / 3.14 / 2</gadget>
<output>2.5</output>

<gadget id="calculator">2.5 ** 2</gadget>
<output>6.25</output>

<gadget id="calculator">3.14 * 6.25 * 2</gadget>
<output>39.25</output>

<gadget id="calculator">246.49 + 39.25</gadget>
<output>285.74</output>

<result>285.74</result>