After a piece of round steel with a length of 8 decimeters is cut into two sections, the total surface area increases by 8 square decimeters, what is the volume of the round steel in cubic decimeters?
把一段长8分米的圆钢横截成两段后，表面积的总和比原来增加了8平方分米，圆钢的体积是多少立方分米．
<gadget id="calculator">8 / 2</gadget>
<output>4</output>

<gadget id="calculator">4 * 8</gadget>
<output>32</output>

<result>32</result>