re...
11x11 = 121
donc
9/11 = 9x11/11x11 = 99/121
et
I = 99/121 - 4/121 = 95/121
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re...
11x11 = 121
donc
9/11 = 9x11/11x11 = 99/121
et
I = 99/121 - 4/121 = 95/121