Cutting a 5-meter-long cuboid into two sections increases the surface area by 0.12 square meters. What is the volume of this piece of wood?
把一根长5米的长方体木料截成2段，表面积增加了0.12平方米．原来这根木料的体积是多少方．
<gadget id="calculator">0.12 / 2</gadget>
<output>0.06</output>

<gadget id="calculator">0.06 * 5</gadget>
<output>0.3</output>

<result>0.3</result>