A cylindrical children's swimming pool has a bottom radius of 4 meters and a depth of 0.5 meters. Spread cement around it and the bottom of the pool, 10 kilograms of cement is needed per square meter, how many kilograms of cement are used in total?
一个圆柱形儿童游泳池底面半径是4米，深0.5米．在它的四周和池底抹上水泥，每平方米需要水泥10千克，一共用水泥多少千克？
<gadget id="calculator">3.14 * 4 * 2 * 0.5</gadget>
<output>12.56</output>

<gadget id="calculator">4 ** 2</gadget>
<output>16</output>

<gadget id="calculator">3.14 * 16</gadget>
<output>50.24</output>

<gadget id="calculator">12.56 + 50.24</gadget>
<output>62.8</output>

<gadget id="calculator">62.8 * 10</gadget>
<output>628</output>

<result>628</result>