Build a reservoir with a bottom diameter of 3 meters and a depth of 4 meters. Put cement on the inner wall and lower bottom of the pool, how many square meters is the area where the cement is applied?
修建一个蓄水池，底面直径是3米，深4米．在池的内壁与下底面抹上水泥，抹水泥部分的面积是多少平方米？
<gadget id="calculator">37.68 + 7.065</gadget>
<output>44.745</output>

<result>44.745</result>