There are 8 cylindrical marble columns of the same size in the hall. The ground radius of each column is 8 decimeters and the height is 5 decimeters. To clean these columns, what is the area to be cleaned?
大厅里有8根一样大小的圆柱形大理石柱，每根柱子的地面半径是8分米，高是5分米．要清洗这些柱子，清洗的面积是多少．
<gadget id="calculator">2 * 3.14 * 8 * 5 * 8</gadget>
<output>2_009.6</output>

<result>2_009.6</result>