Dig a cylindrical pool with a depth of 1.5 meters and a bottom diameter of 8 meters. It is necessary to plaster the bottom and walls of the pool with cement. What is the area of the cemented part?
挖一个深1.5米，底面直径8米的圆柱形水池，要在池的底面和池壁抹水泥，抹水泥部分的面积是多少平方米？
<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">25.12 * 1.5</gadget>
<output>37.68</output>

<gadget id="calculator">50.24 + 37.68</gadget>
<output>87.92</output>

<result>87.92</result>