After cutting a 5-meter-long cuboid block into 4 sections, the surface area increases by 0.48 square meters compared with the original one. What is the original volume of this block in cubic meters?
把一根5米长的长方体木块截成4段后，表面积比原来增加了0.48平方米，原来这根木块的体积是多少立方米．
<gadget id="calculator">0.48 / 6</gadget>
<output>0.08</output>

<gadget id="calculator">0.08 * 5</gadget>
<output>0.4</output>

<result>0.4</result>