If a cube of wood has a base area of 10cm**2, if it is cut into 3 sections, how much does the surface area increase by cm**2?
一根正方体的木料，它的底面积是10cm**2，把它截成3段，表面积增加了多少cm**2．
<gadget id="calculator">10 * 4</gadget>
<output>40</output>

<result>40</result>