There are 10 cylindrical pillars in the hall. The perimeter of the base is 2.5 meters and the height is 6 meters. The surface of these pillars is painted with 0.5 kilograms of paint per square meter on average. How many kilograms of paint are needed in total?
大厅里有10根圆柱形的柱子，它的底面周长是2.5米，高6米，在这些柱子的表面涂漆，平均每平方米用漆0.5千克，共需油漆多少千克？
<gadget id="calculator">2.5 * 6</gadget>
<output>15</output>

<gadget id="calculator">15 * 10</gadget>
<output>150</output>

<gadget id="calculator">150 * 0.5</gadget>
<output>75</output>

<result>75</result>