There are the same 8 columns in the exhibition hall. The height of the columns is 9 meters, and the diameter is the highest (1/9). All of them need to be painted with paint. If 100 grams of paint is used per square meter, how many kilograms of paint are needed?
展览厅有同样的8根圆柱，柱高9米，直径是高的(1/9)，要全部刷上油漆，如果每平方米用油漆100克，需多少千克油漆？
<gadget id="calculator">1 / 9</gadget>
<output>1/9 = around 0.111111</output>

<gadget id="calculator">100 / 1_000</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">3.14 * 9 * (1/9) * 9 * 8 * (1/10)</gadget>
<output>22.608</output>

<result>22.608</result>