$\"\"$

If the box is $\"\"$ long by $\"\"$ wide, then two $\"\"$ cubes can be placed lengthwise and three cubes can be placed widthwise for a total of $\"\"$ .

The box is $\"\"$ high so only one layer of cubes can be stacked in the box for a total of $\"\"$ .

$\"\"$

The correct choice is $\"\"$ .