A 5-meter-long cuboid has a square cross-section. If it is sawed into two pieces, the surface area will increase by 32 square meters. What is the original volume of this wood in cubic meters?
一根长5米的长方体木料的横截面是正方形，把它锯成两段，表面积与原来增加32平方米，原来这根木料的体积是多少立方米．
<gadget id="calculator">32 / 2</gadget>
<output>16</output>

<gadget id="calculator">16 * 5</gadget>
<output>80</output>

<result>80</result>