As soon as you enter the gate of Shuanghou Central Primary School, there are 4 cylindrical marble columns of the same size in front of the hall. The diameter of each column is 60 decimeters and the height is 4 meters. If you want to clean the four columns, what is the cleaning area? rice.
一进双堠中心小学校门，楼厅前面有4根大小一样的圆柱形大理石柱，每根柱子的直径是60分米，高是4米，如果要清洗四根柱子，清洗的面积是多少平方米．
<gadget id="calculator">60 / 10</gadget>
<output>6</output>

<gadget id="calculator">3.14 * 6 * 4 * 4</gadget>
<output>301.44</output>

<result>301.44</result>