bismiallahé arrahmani arrahémé
1
121
12321
1234321
123454321
12345654321
1234567654321
123456787654321
12345678987654321
1234567900987654321
123456790120987654321
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1*1=1
11*11=121
111*111=12321
1111*1111=1234321
11111*11111=123454321
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benabderrahmane shokrane merci