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It's the prime factorization. 2 x 3 x 5 x 7 = 210
1 x 7 7 x 7
2 x 7
147 is equal to 21 x 7, or 3 x 7 x 7, or 49 x 3.
7 x 4
1 x 210, 2 x 105, 3 x 70, 5 x 42, 6 x 35, 7 x 30, 10 x 21, 14 x 15.
200 x 7 = 1400 30 x 7 = 210 5 x 7 = 35 1400 + 210 + 35 = 1645
7 X 30 equals 210.
1 x 875, 5 x 175, 7 x 125, 25 x 35.
1 x 56, 2 x 28, 4 x 14, 7 x 8.
2 x 3 x 5 x 7 = 210 2 x 7 x 7 = 98
210 = 1 x 210 210 = 2 x 105 210 = 3 x 70 210 = 5 x 42 210 = 6 x 35 210 = 7 x 30 210 = 10 x 21 210 = 14 x 15