How many kinds of spelling methods are there? What is the shortest perimeter of a rectangle?

Because: 12 = 1 × 2 × 2 × 3
So there are:
Length: 4, width: 3
Length: 6, width: 2
Length: 1, width: 12
There are three spelling methods, and the perimeter is:
4×2×(4+3)=56cm
4×2×(6+2)=64cm
4×2×(1+12)=88cm
Because: 56

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