If a cylinder with a height of 1 meter is sawn into 4 sections, the surface area increases by 12 square meters. What is the volume of the cylinder in cubic meters?
把高1米的圆柱体木料锯成4段，表面积增加了12平方米，原来这根圆柱体的体积是多少立方米．
<gadget id="calculator">12 / 6</gadget>
<output>2</output>

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

<result>2</result>