There are 5 identical cylindrical wooden columns in the corridor of Focheng Park. The circumference of each wooden column is 1.05 meters and the height is 4 meters. If 40 grams of paint is used per square meter, how many kilograms of paint are needed to paint these wooden columns?
佛城公园走廊有5根相同的圆柱形木柱，每根木柱底面周长是1.05米，高4米．如果每平方米用油漆40克，要漆完这些木柱，共需要多少千克油漆？
<gadget id="calculator">5 / 1_000</gadget>
<output>1/200 = around 0.005</output>

<gadget id="calculator">40 * 1.05 * 4 * (1/200)</gadget>
<output>0.84</output>

<result>0.84</result>