A cylinder with a base area of 12.56 square centimeters and a side area of 18.84 square centimeters, put 3 such cylinders together to form a large cylinder, what is the surface area of this large cylinder in square centimeters?
一个底面积是12.56平方厘米，侧面积是18.84的圆柱体，把3个这样的圆柱体拼成一个大圆柱体，这个大圆柱体的表面积是多少平方厘米．
<gadget id="calculator">18.84 * 3</gadget>
<output>56.52</output>

<gadget id="calculator">12.56 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">56.52 + 25.12</gadget>
<output>81.64</output>

<result>81.64</result>