Approximation 10 of Pi

Use the approximate formula to find the approximation of pi.

Use the following approximate formula to find the approximation of pi.

π = {(3√3)/2}･{(3･3)/(2･4)}･{(6･6)/(5･7)}･{'9･9)/(8･10)}･{(12･12)/(11･13)}･･･

Let's observe how the approximate value can be obtained as the number of terms increases.