Use the following approximation formula to find an approximation of pi.
π = (2√2) ・ {(4.4) / (3.5)} ・ {(8.8) / (7.9)} ・ {(12 ・ 12) / (11 ・ 13)} ・{(16/16) / (15/17)} ...
Let's observe how the approximate value of pi can be obtained as the number of terms increases.