Divide the bottom surface of a cylinder with a diameter of 2 decimeters into many equal sectors, and then cut the circle along the diameter to form a cuboid equal to its volume. The surface area of this cuboid is 8 square decimeters larger than the surface area of the original cylinder. This What is the volume of the cuboid?
把一个直径是2分米的圆柱的底面分成许多相等的扇形，然后沿直径把圆切开，拼成一个和它体积相等的长方体，这个长方体表面积比原来圆柱的表面积增加8平方分米，这个长方体的体积是多少？
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

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

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

<gadget id="calculator">4 * 3.14</gadget>
<output>12.56</output>

<result>12.56</result>