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The number 12345679


If we multiply the number 12345679 by any multiple of 9, between 9 and 81, we get a product whose repeating digit is the multiplier itself divided by 9.
12345679 x 9 = 111,111,111 (9/9 = 1)
12345679 x 18 = 222,222,222 (18/9 = 2)
12345679 x 27 = 333,333,333 (27/9 = 3)
12345679 x 36 = 444,444,444 (36/9 = 4)
12345679 x 45 = 555,555,555 (45/9 = 5)
12345679 x 54 = 666,666,666 (54/9 = 6)
12345679 x 63 = 777.777.777 (63/9 = 7)
12345679 x 72 = 888,888,888 (72/9 = 8)
12345679 x 81 = 999,999,999 (81/9 = 9)