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some pattern is square numbers?please give me some examples

1 x 1
11 x 11
111 x 111
1111 x 1111
11111 x 11111 
 
7 x 7
67 x 67
667 x 667
6667 x 6667
66667 x 66667
9 x 9
99 x 99
999 x 999
9999 x 9999
99999 x 99999



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