You can put this solution on YOUR website!
This problem keeps coming up and I am always re-drawing the picture.
As you cut squares out of each corner (I made them red),
each square measuring
inches to a side,
you get four
-inch wide flaps to fold up around the (green) square bottom.
The side of that green square is
The surface area of the green square is
The flaps/sides will be
with a total surface area of
The surface area of the box (just four sides and bottom, because we have no top/lid) is
square inches, so
The box will be
with a base surface of
square inches (as calculated above),
and a volume of
I know I make stupid arithmetic mistakes, so don't trust my calculations.