After cutting a cylinder into an approximate cuboid, the surface area increases by 6 decimeters squared. Given that the height of the cuboid is 2 decimeters, find the volume of the cylinder.
将一个圆柱切拼成一个近似的长方体后表面积增加了6平方分米，已知长方体的高为2分米，求圆柱的体积．
<gadget id="calculator">6 / 2 / 2</gadget>
<output>3/2 = around 1.5</output>

<gadget id="calculator">(3/2) ** 2</gadget>
<output>9/4 = around 2.25</output>

<gadget id="calculator">3.14 * (9/4) * 2</gadget>
<output>14.13</output>

<result>14.13</result>