A professional grain household builds a cylindrical reservoir with a bottom circle of 2 meters in diameter and a depth of 3 meters. The bottom and sides of the pool need to be touched with cement. If 20 kilograms of cement is used per square meter, how many kilograms of cement will be used in total?
一个粮食专业户建造一个圆柱形蓄水池，底面圆的直径是2米，深3米．在池的底面和侧面需要摸上水泥，如果每平方米用水泥20千克，一共要用水泥多少千克？
<gadget id="calculator">3.14 * 2 * 3</gadget>
<output>18.84</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">18.84 + 3.14</gadget>
<output>21.98</output>

<gadget id="calculator">21.98 * 20</gadget>
<output>439.6</output>

<result>439.6</result>