A cylinder has a base radius and a height of 2 meters, what is its surface area in square meters?
一个圆柱的底面半径和高都是2米，它的表面积是多少平方米？
<gadget id="calculator">3.14 * 2 * 2 * 2</gadget>
<output>25.12</output>

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

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

<gadget id="calculator">25.12 + 25.12</gadget>
<output>50.24</output>

<result>50.24</result>