bismiallahé arrahmani arrahémé
9*9=81.
99*99=9801
999*999=998001
9999*9999=99980001
81
9801
998001
99980001
9999800001
999998000001
99999980000001
9999999800000001
999999998000000001
99999999980000000001
.................................
...................................
9999999999999999999999999*9999999999999999999999999=
99999999999999999999999980000000000000000000000001
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