3-meter-long square steel is cut into 3 sections, and the surface area is increased by 80cm**2. What is the volume of this square steel in cm**3?
把一根3米长的方钢拦腰横截成3段，表面积增加了80cm**2，原业这根方钢的体积是多少cm**3．
<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">3 * 100</gadget>
<output>300</output>

<gadget id="calculator">20 * 300</gadget>
<output>6_000</output>

<result>6_000</result>