4Â Â Â Â Â 6Â Â Â Â Â Â 12Â Â Â Â Â 30 Â Â Â Â Â Â 90 Â Â Â Â Â Â Â 310
4 × 1.5 = 6 6 × 2 = 12 12 × 2.5 = 30 30 × 3 = 90 90 × 3.5 = 315
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