When 3 cubes of equal size are put together to form a cuboid, the surface area is reduced by 4 square centimeters. What is the volume of the cuboid?
3个大小相等的正方体拼成一个长方体后，表面积减少了4平方厘米，这个长方体的体积是多少．
<gadget id="calculator">4 / 4</gadget>
<output>1</output>

<gadget id="calculator">1 * 1 * 1 * 3</gadget>
<output>3</output>

<result>3</result>