Chen Ming's school is called Zhenneng Primary School. As soon as you enter the school gate, you can see 8 cylindrical marble columns of the same size in the hall. The radius of each column is 5 decimeters and the height is 6 meters. If you want to clean these columns, clean them. What is the area in square meters.
陈明的学校叫振能小学，一进校门，就能看到大厅的8根一样大小的圆柱形大理石柱，每根柱子的半径是5分米，高6米，如果要清洗这些柱子，清洗的面积是多少平方米．
<gadget id="calculator">5 / 10</gadget>
<output>1/2 = around 0.5</output>

<gadget id="calculator">2 * 3.14 * (1/2) * 6 * 8</gadget>
<output>150.72</output>

<result>150.72</result>