A cylindrical sewage well with a depth of 5 meters and a bottom diameter of 2 meters should be plastered with a layer of cement on the bottom of the well and its surroundings. Find the area of the surface to be plastered with cement.
一个圆柱形的污水井，井深5米，底面直径2米，要在井底和周围抹一层水泥，求抹水泥的面的面积．
<gadget id="calculator">3.14 * 2 * 5</gadget>
<output>31.4</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1</gadget>
<output>3.14</output>

<gadget id="calculator">31.4 + 3.14</gadget>
<output>34.54</output>

<result>34.54</result>