The side view of a cylinder is a rectangle. The length of the rectangle is 12.56 cm and the width is 3 cm. What is its surface area?
一个圆柱的侧面展开图是长方形，长方形的长是12.56厘米，宽是3厘米，它的表面积是多少？
<gadget id="calculator">12.56 * 3</gadget>
<output>37.68</output>

<gadget id="calculator">12.56 / 3.14 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

<gadget id="calculator">37.68 + 25.12</gadget>
<output>62.8</output>

<result>62.8</result>