A 3m long cuboid wood is cut into 3 sections on average, and the surface area increases by 100dm**2, what is the volume of the original wood in cubic decimeters?
把一根长为3m的长方体木材平均截成3段，表面积增加了100dm**2，原木材的体积是多少立方分米？
<gadget id="calculator">3 - 1</gadget>
<output>2</output>

<gadget id="calculator">2 * 2</gadget>
<output>4</output>

<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">3 * 10</gadget>
<output>30</output>

<gadget id="calculator">25 * 30</gadget>
<output>750</output>

<result>750</result>