Uncle Zhang’s family built a cylindrical reservoir with a bottom radius of 2 meters and a depth of 2 meters this year. The sides and the bottom are to be plastered with cement. If 5 kilograms of cement is needed per square meter, how many kilograms of cement will be needed in total?
张伯伯家今年修了一个底面半径为2米，深为2米的圆柱形蓄水池，要在侧面和底面抹上水泥，如果每平方米需要水泥5千克，一共需要多少千克水泥？
<gadget id="calculator">2 * 3.14 * 2 * 2</gadget>
<output>25.12</output>

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

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

<gadget id="calculator">25.12 + 12.56</gadget>
<output>37.68</output>

<gadget id="calculator">37.68 * 5</gadget>
<output>188.4</output>

<result>188.4</result>