The height of a cylinder is 3.14 decimeters, and the sides are expanded into a square. What is the surface area of this cylinder in square decimeters?
一个圆柱高3.14分米，侧面展开为正方形，这个圆柱表面积是多少平方分米．
<gadget id="calculator">3.14 * 3.14</gadget>
<output>9.8596</output>

<gadget id="calculator">3.14 / 3.14 / 2</gadget>
<output>0.5</output>

<gadget id="calculator">0.5 ** 2</gadget>
<output>0.25</output>

<gadget id="calculator">3.14 * 0.25 * 2</gadget>
<output>1.57</output>

<gadget id="calculator">9.8596 + 1.57</gadget>
<output>11.4296</output>

<result>11.4296</result>