cuboid wood is 2m long, cut into 3 sections, the surface area increases by 100cm**2. What is the volume of this piece of wood in dm**3.
一根长方体木料长2m，截成3段，表面积增加100cm**2．这根木料的体积是多少dm**3．
<gadget id="calculator">100 / 4</gadget>
<output>25</output>

<gadget id="calculator">100 / 1_000</gadget>
<output>1/10 = around 0.1</output>

<gadget id="calculator">25 * 2 * (1/10)</gadget>
<output>5</output>

<result>5</result>