There are 8 cylindrical pillars in the corridor of the school, each pillar has a base radius of 4 decimeters and a height of 30 decimeters. Now these pillars are to be painted, if 0.25 kilograms of paint is used per square decimeter, how many kilograms of paint are needed in total?
学校走廊上有8根圆柱形柱子，每根柱子的底面半径是4分米，高30分米．现要油漆这些柱子，如果每平方分米用油漆0.25千克，共需要油漆多少千克？
<gadget id="calculator">2 * 3.14 * 4 * 30 * 8 * 0.25</gadget>
<output>1_507.2</output>

<result>1_507.2</result>