Divide the bottom surface of a cylinder with a height of 3 decimeters into many equal sectors, then cut the cylinder and assemble it into an approximate cuboid with the same base and height, its surface area is increased by 36 square minutes compared with the surface area of the cylinder m, find the volume of this cylinder.
把一个高3分米的圆柱体的底面分成许多相等的扇形，然后把圆柱体切开，拼成一个与它等底等高的近似长方体，它的表面积比圆柱体的表面积增加了36平方分米，求这个圆柱体的体积．
<gadget id="calculator">36 / 2 / 3</gadget>
<output>6</output>

<gadget id="calculator">6 ** 2</gadget>
<output>36</output>

<gadget id="calculator">3.14 * 36 * 3</gadget>
<output>339.12</output>

<result>339.12</result>