After a 5-meter-long piece of wood is cut into two sections along the cross-section, the surface area increases by 2 square meters. What is the volume of this piece of wood in cubic meters?
把一根长5米的木料沿着横截面截成2段后，表面积增加了2平方米．原来这根木料的体积是多少立方米．
<gadget id="calculator">2 / 2</gadget>
<output>1</output>

<gadget id="calculator">1 * 5</gadget>
<output>5</output>

<result>5</result>