A cylindrical wooden stick with a length of 16 meters and a cross-section of 4 decimeters in diameter is cut into 3 sections on average, and then all of them are painted with color. What is the area of the painted part?
一根长16米，横截面是直径为4分米的圆柱形木棍，将它平均截成3段，然后全部涂色颜色，涂色部分的面积是多少．
<gadget id="calculator">16 * 10</gadget>
<output>160</output>

<gadget id="calculator">3.14 * 4 * 160</gadget>
<output>2_009.6</output>

<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 ** 2</gadget>
<output>4</output>

<gadget id="calculator">3.14 * 4 * 6</gadget>
<output>75.36</output>

<gadget id="calculator">2_009.6 + 75.36</gadget>
<output>2_084.96</output>

<result>2_084.96</result>