If a cylinder with a height of 1 meter is sawed into two pieces, the surface area increases by 16 square meters. What is the volume of the original cylinder?
把高1米的圆柱锯成两段，表面积增加了16平方米，原来这个圆柱体的体积是多少．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 * 1</gadget>
<output>8</output>

<result>8</result>