A cylinder has a base radius of 3 decimeters and a lateral area of 37.68 square decimeters. What is the surface area of this cylinder.
一个圆柱的底面半径是3分米，侧面积是37.68平方分米．这个圆柱的表面积是多少．
<gadget id="calculator">3 ** 2</gadget>
<output>9</output>

<gadget id="calculator">3.14 * 9 * 2</gadget>
<output>56.52</output>

<gadget id="calculator">37.68 + 56.52</gadget>
<output>94.2</output>

<result>94.2</result>