Please read and enjoy these fascinating calculations!
[color=black]e1 x 8 + 1 = 9
e12 x 8 + 2 = 98
e123 x 8 + 3 = 987
e 1234x 8 + 4 = 9876
e 12345x 8 + 5 = 98765
e 123456x 8 + 6 = 987654
e 1234567x 8 + 7 = 9876543
e 12345678 x 8 + 8 = 98765432
[color:d36b=white:d36b]e123456789 x 8 + 9 = 987654321
[color=white]t 1 x 9 + 2 = t11
t12 x 9 + 3 = 111
t123 x 9 + 4 = 1111
t1234 x 9 + 5 = 11111
t12345 x 9 + 6 = 111111
t123456 x 9 + 7 = 1111111
t1234567 x 9 + 8 = 11111111
t12345678 x 9 + 9 = 111111111
[color:d36b=white:d36b]t123456789 x 9 +10 = 1111111111
[color=white]t 9 x 9 + 7 = 88
t98 x 9 + 6 = 888
t987 x 9 + 5 = 8888
t9876 x 9 + 4 = 88888
t98765 x 9 + 3 = 888888
t987654 x 9 + 2 = 8888888
t9876543 x 9 + 1 = 88888888
[color:d36b=white:d36b]t98765432 x 9 + 0 = 888888888
[color=darkred]And finally, take a look at this symmetry:
g 1x 1 = 1
g11 x 11 = 121
g111 x 111 = 12321
g1111 x 1111 = 1234321
g11111 x 11111 = 123454321
g111111 x 111111 = 12345654321
g1111111 x 1111111 = 1234567654321
g11111111 x 11111111 = 123456787654321
[color:d36b=white:d36b]g111111111 x 111111111 = 12345678987654321
Brilliant, isn't it