(12, 60, 360) → 12 x 5 = 60, 60 x 6 = 360. 15, 75, 450 → 15 x 5 = 75, 75 x 6 = 450. 28, 140, 840 → 28 x 5 = 140, 140 x 6 = 840. 33, 165, 990 → 33 x 5 = 165, 165 x 6 = 990. 21, 105, 730 → 21 x 5 = 105, 105 x 6 = 630.
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