To paint 10 cylinders with a base diameter of 8 decimeters and a height of 5 decimeters, if it costs 3.5 yuan per square meter to paint, how much does it cost to paint these timbers?
要油漆10根底面直径是8分米，高是5分米的圆柱体木料，如果每油漆1平方米要花3.5元，那么油漆这些木料需要多少钱？
<gadget id="calculator">10 / 1_000</gadget>
<output>1/100 = around 0.01</output>

<gadget id="calculator">226.08 * (1/100) * 3.5</gadget>
<output>7.9128</output>

<gadget id="calculator">7.9128 * 10</gadget>
<output>79.128</output>

<result>79.128</result>