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(63 ÷ 7) × 3 = 27
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27
3*21 = 63 so 63 is divisible by 3 7*9 = 63 so 63 is divisible by 7.
63 = 3 * 3 * 7
-63 / 3 = -21
2/3 of 63 = 42
There are: 63/3 = 21