Tamura-Kanada Circuit Method/Example

Example of Use of Tamura-Kanada Circuit Method
Starting with $A = X = 1$, $B = \dfrac 1 {\sqrt 2}$, $C = \dfrac 1 4$, the successive values of $\dfrac {\paren {A + B}^2} {4 C}$ on the first $3$ loops are:

and it is seen that the value for $\pi$ is already correct to $6$ decimal places.