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1 * 8 + 1 = 9
12 * 8 +2 = 98
123 * 8 + 3 = 987
1234 * 8 + 4 = 9876
12345 * 8 + 5 = 98765
123456 * 8 + 6 = 987654
1234567*8+7=9876543
12345678*8+8=98765432
123456789*8+9=987654321
1* 9 + 2 = 11
12* 9 + 3= 111
123*9 + 4 = 1111
1234*9+5=11111
12345*9+6=111111
123456*9+7=1111111
1234567*9+8=11111111
12345678*9+9=111111111
123456789*9+10=1111111111
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