9 x 9 + 7 = 88
98 x 9 + 6 = 888
987 x 9 + 5 = 8888
9876 x 9 + 4 = 88888
98765 x 9 + 3 = 888888
987654 x 9 + 2 = 8888888
9876543 x 9 + 1 = 88888888
98765432 x 9 + 0 = 888888888
1 x 1 = 1.
11 x 11 = 121.
111 x 111 = 12321.
1111 x 1111 = 1234321.
11111 x 11111 = 123454321.
111111 x 111111 = 12345654321.
1111111 x 1111111 = 1234567654321.
11111111 x 11111111 = 123456787654321.
111111111 x 111111111 = 12345678987654321.
