A building has 2 large cylinders to be painted. The circumference of the cylinders is 2.5 meters and the height is 6.2 meters. If 1 kilogram of paint can paint 5 square meters, how many kilograms of paint should be used?
某建筑物有2根大圆柱要油漆，圆柱的底周长2.5米，高6.2米，按1千克油漆可漆5平方米计算，要用多少千克油漆？
<gadget id="calculator">2 / 5</gadget>
<output>2/5 = around 0.4</output>

<gadget id="calculator">2.5 * 6.2 * (2/5)</gadget>
<output>6.2</output>

<result>6.2</result>