22/7 3.142857^_ (period 6)
3. 142857 142857142857142857142857142857142857142857142857142857...
puis :
333/106 3.14150943396226^_ (period 13)
3.1 4150943396226 4150943396226 415094339622641509433962264150943...
puis
355/113 3. 141592920353982300884955752212389380530973451327433628^_\
31858407079646017699115044247787610619469026548672566371^_\
68^_
(period 112)
22+333=355
7+106=113
comme si (a/b)+(c/d) = (a+c)/(b
pi~~3, 22/7, 333/106, 355/113, ...
(simple continued fraction convergent sequence)
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