(A)Diameter is girth divided by pi:
(B)Radius is half the diameter:
(C)Now, square the radius:
(D)Area (“A”) is pi times this (πr2):
(E)Basic tree value (“V”) is $22 times this:
(F)Simplify into one fraction:
(G)Substitute 31/7 for pi:
(H)Make the denominator into one fraction:
(I)To divide by 44/7 is to multiply by 7/44:
(J)Divide both numerator & denominator by 11: