After sawing a 4-meter-long cuboid into four 1-meter-long pieces, the surface area increases by 90dm**2. What is the volume of this piece of wood in m**3?
把一根长4米的长方体木料锯成1米长的四段后，表面积增加了90dm**2，这根木料的体积是多少m**3．
<gadget id="calculator">0.9 / 6</gadget>
<output>0.15</output>

<gadget id="calculator">0.15 * 4</gadget>
<output>0.6</output>

<result>0.6</result>