If a 2-meter-long cuboid steel is cut into two sections, the surface area increases by 2.4 square decimeters compared to the original one. What is the original volume of the steel in cubic decimeters?
把一根长2米的长方体钢材截成两段，表面积比原来增加了2.4平方分米，这根钢材原来的体积是多少立方分米．
<gadget id="calculator">2.4 / 2</gadget>
<output>1.2</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">1.2 * 20</gadget>
<output>24</output>

<result>24</result>