Dig a cylindrical pool in Hongxing Township. The diameter of the bottom surface is 4 meters, and the depth of the pool is 2 meters. The bottom surface and surrounding areas of the pool are coated with cement. How many square meters is the area covered with cement?
红星乡挖一个圆柱形水池，底面直径是4米，水池深是2米，在水池的底面和四周涂上水泥，涂水泥的面积是多少平方米？
<gadget id="calculator">3.14 * 4 * 2</gadget>
<output>25.12</output>

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

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

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

<gadget id="calculator">25.12 + 12.56</gadget>
<output>37.68</output>

<result>37.68</result>