A cuboid piece of wood is 2 meters long. If it is cut into two pieces of 1-meter-long cuboid piece of wood, the surface area will increase by 4cm**2. What is the volume of this piece of wood in centimeters?
一根长方体木料长2米，如果把它截成两根1米长的长方体木料，表面积就增加4厘米**2，这根木料的体积是多少厘米3．
<gadget id="calculator">4 / 2</gadget>
<output>2</output>

<gadget id="calculator">2 * 100</gadget>
<output>200</output>

<gadget id="calculator">2 * 200</gadget>
<output>400</output>

<result>400</result>