The cylindrical wood is cut into two sections, the surface area is increased by 16 square centimeters, the total length of the two sections is 2.5 meters, find the volume of the cylinder.
圆柱形木料截成两段，表面积增加16平方厘米，两段共长2.5米，求圆柱的体积．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">2.5 * 100</gadget>
<output>250</output>

<gadget id="calculator">8 * 250</gadget>
<output>2_000</output>

<result>2_000</result>