Use four pieces of the same rectangle and two pieces of the same square cardboard to make a cuboid carton. Its surface area is 266 square decimeters. The length, width and height of the cuboid are all integer decimeters. As large as possible, what is the volume of this carton?
用四块同样的长方形和两块同样的正方形纸板做成一个长方体的纸箱，它的表面积是266平方分米，长方体的长、宽、高的长度都是整数分米，并且使纸盒的容积尽可能大，这个纸箱的容积是多少？
<gadget id="calculator">7 * 7 * 6</gadget>
<output>294</output>

<result>294</result>