The diameter of the bottom of a cylindrical pool is 8 meters, and the depth of the pool is 2 meters. If cement is to be plastered on the bottom of the pool and the surrounding walls, how many square meters is the area covered with cement?
一个圆柱形水池的底面直径是8米，池深2米，如果要在水池的底面和四周池壁抹上水泥，抹上水泥的面积是多少平方米？
<gadget id="calculator">3.14 * 8 * 2</gadget>
<output>50.24</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">50.24 + 50.24</gadget>
<output>100.48</output>

<result>100.48</result>