cylinder has a base radius of 8 decimeters and a height of 2 meters, what is the surface area of the cylinder?
一个圆柱的底面半径是8分米，高是2米，则这个圆柱的表面积是多少？
<gadget id="calculator">8 ** 2</gadget>
<output>64</output>

<gadget id="calculator">3.14 * 64 * 2</gadget>
<output>401.92</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">3.14 * 8 * 2 * 20</gadget>
<output>1_004.8</output>

<gadget id="calculator">401.92 + 1_004.8</gadget>
<output>1_406.72</output>

<result>1_406.72</result>