After sawing a log with a height of 1 meter into two pieces, its surface area increases by 16 square decimeters. What is the volume of the log?
把一个高1米的圆木锯成2段后，它的表面积增加了16平方分米，这根圆木的体积是多少．
<gadget id="calculator">16 / 2</gadget>
<output>8</output>

<gadget id="calculator">8 * 1 * 10</gadget>
<output>80</output>

<result>80</result>