A cylindrical wooden stick is burned away by 0.8 meters, and its surface area is reduced by 2512 square centimeters. What is the volume of the burned part in cubic decimeters?
一根圆柱形的木棒被烧掉0.8米，表面积减少了2512平方厘米，被烧掉部分的体积是多少立方分米？
<gadget id="calculator">0.8 * 100</gadget>
<output>80</output>

<gadget id="calculator">2_512 / 80 / 3.14 / 2</gadget>
<output>5</output>

<gadget id="calculator">5 ** 2</gadget>
<output>25</output>

<gadget id="calculator">80 / 1_000</gadget>
<output>2/25 = around 0.08</output>

<gadget id="calculator">3.14 * 25 * (2/25)</gadget>
<output>6.28</output>

<result>6.28</result>