1 x 7120, 2 x 3560, 4 x 1780, 5 x 1424, 8 x 890, 10 x 712, 16 x 445, 20 x 356, 40 x 178, 80 x 89 = 7,120
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The digit in the ones position is a 9, so we round up, to give 7120 as the answer.
Prime numbers go on forever.
It is a pattern. Go up two numbers, go down two numbers.
Factors go into numbers, numbers go into multiples.Factors go into numbers, numbers go into multiples.
Factors go into numbers, numbers go into multiples.