As a product of its prime factors: 2*3*3*3 = 54
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the answer is 2
You multiply the number by .25 or divide the number by 4, they will both give the correct answer.
There are 4 of them which are 2*3*3*3 = 54
7
Multiply it by 0.75 or divide it by 4 and multiply it by 3.