A 3-meter-long square steel, when it is cut into 3 sections, the surface area increases by 80 square centimeters, what is the original volume of the square steel?
一根3米长的方钢，把它横截成3段时，表面积增加80平方厘米，原来方钢的体积是多少．
<gadget id="calculator">80 / 4</gadget>
<output>20</output>

<gadget id="calculator">20 * 3 * 100</gadget>
<output>6_000</output>

<result>6_000</result>