There is a piece of cylindrical wood with a height of 8 decimeters. If it is cut vertically along the diameter of the bottom surface, the surface area will increase by 32 square decimeters. Find the volume of this piece of wood.
有一段圆柱形木料，高8分米，如果沿底面直径把它垂直锯开，这样表面积比原来增加了32平方分米，求这段木料的体积．
<gadget id="calculator">32 / 2 / 8</gadget>
<output>2</output>

<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 ** 2</gadget>
<output>1</output>

<gadget id="calculator">3.14 * 1 * 8</gadget>
<output>25.12</output>

<result>25.12</result>