If a cuboid block with a length of 2 decimeters is cut into 2 sections, the surface area is increased by 4 cm2, what is the volume of the cuboid block in cubic centimeters?
把长是2分米的长方体木块截成2段，表面积增加4平方厘米，长方体木块的体积是多少立方厘米．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

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

<gadget id="calculator">2 * 20</gadget>
<output>40</output>

<result>40</result>