A cuboid wooden block, if the small cuboids with a height of 4 decimeters and 3 decimeters are cut off from the lower part and the upper part respectively, it becomes a cube, and the surface area is reduced by 336 square decimeters. Find the volume of the original cuboid in cubic rice?
一个长方体木块，若从下部和上部分别截去高为4分米和3分米的小长方体后，便成了一正方体，表面积减少了336平方分米，求原来的长方体的体积是多少立方米？
<gadget id="calculator">4 + 3</gadget>
<output>7</output>

<gadget id="calculator">336 / 7 / 4</gadget>
<output>12</output>

<gadget id="calculator">12 + 4 + 3</gadget>
<output>19</output>

<gadget id="calculator">12 * 12 * 19</gadget>
<output>2_736</output>

<result>2_736</result>