There is a circular reservoir with a bottom radius of 2 meters and a depth of 3 meters. Cement is placed on the bottom of the pool and its surroundings. If 20 kilograms of cement is used per square meter, how many kilograms of cement will be used in total?
有一个圆形蓄水池，底面半径2米，深3米，在池底和四周抹上水泥，如果每平方米用水泥20千克，一共要用多少千克水泥？
<gadget id="calculator">3.14 * 2 * 2 * 3</gadget>
<output>37.68</output>

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

<gadget id="calculator">3.14 * 4</gadget>
<output>12.56</output>

<gadget id="calculator">37.68 + 12.56</gadget>
<output>50.24</output>

<gadget id="calculator">50.24 * 20</gadget>
<output>1_004.8</output>

<result>1_004.8</result>