I stand corrected, in the hollow of a tree

A brother of mine sent in the following correction to my admittedly sloppy, rounded up, calculations regarding the housing amenities of Blessed Waldo:

A tree with a circumference of 50 feet has an interior area, assuming walls
of zero thickness, of 198.9437 square feet (not 220 square feet). Assuming
a more realistic wall thickness of 2 feet, the area of a hollow tree 50 feet
in circumference would be 111.51 square feet, which is a little small even
by New York standards. (Of course, since saints live to suffer, so the
smaller, the better, of course!)

Even if the walls were only a foot thick, the interior space would be
152.0853 square feet, and the tree’s structural soundness might be in question.

Just something to ponder.

BTW, the only way the inside of a hollow tree with a circumference with 50
feet could have an area of 220 square feet would be for the walls to be
infinitely thin and for π to be equal to 3.4741, which is 110.5841% of the
real value.