After sawing a 1-meter-long square log into two pieces, the surface area increases by 8 square centimeters compared to the original one. What is the original volume of this square log in cubic centimeters?
1米长的方木锯成两段后，表面积比原来增加了8平方厘米，这根方木原来的体积是多少立方厘米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 1 * 100</gadget>
<output>400</output>

<result>400</result>