Li Village plans to build a cylindrical reservoir with a bottom diameter of 8 meters and a depth of 2.5 meters. The inner wall and bottom of the pool are to be plastered with cement. How many square meters is the area of the cemented part?
李村计划建一个圆柱形蓄水池，水池底面直径8米，深2.5米．要把水池的内壁和底面抹上水泥，抹水泥部分的面积是多少平方米？
<gadget id="calculator">3.14 * 8 * 2.5</gadget>
<output>62.8</output>

<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">62.8 + 50.24</gadget>
<output>113.04</output>

<result>113.04</result>