The circumference of the base of a cylinder is 37.68 decimeters, and the height is 3 decimeters. Find the surface area of the cylinder.
一个圆柱的底面周长是37.68分米，高是3分米，求这个圆柱的表面积．
<gadget id="calculator">37.68 * 3</gadget>
<output>113.04</output>

<gadget id="calculator">37.68 / 3.14 / 2</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36 * 2</gadget>
<output>226.08</output>

<gadget id="calculator">113.04 + 226.08</gadget>
<output>339.12</output>

<result>339.12</result>