If a 2m long cuboid wood is cut into 4 sections, the surface area is just increased by 36dm**2, how many cubic decimeters does this wood have?
把一根长2m的长方体木材截成4段，表面积正好增加36dm**2，原来这根木材有多少立方分米？
<gadget id="calculator">4 - 1</gadget>
<output>3</output>

<gadget id="calculator">3 * 2</gadget>
<output>6</output>

<gadget id="calculator">36 / 6</gadget>
<output>6</output>

<gadget id="calculator">2 * 10</gadget>
<output>20</output>

<gadget id="calculator">6 * 20</gadget>
<output>120</output>

<result>120</result>