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• Comment if you have anything unclear about the challenge
• Personally I would suggest your answer contains a explanation if you are using a golfing language
• I'm wondering whether there is a formula that directly allows you to calculate the result

• Comment if you have anything unclear about the challenge
• Personally I would suggest your answer contains a explanation if you are using a golfing language
• Thanks to @GregMartin, read his answer for a good mathematical explanation for the challenge.

Origami (folding paper) is a creative form of art. Let's start from beginning - convert a rectangular paper to a square one.

• This is a code-golf so shortest code wins
• Pay attention to standard loopholes
• It's your freedom to decide how to read input and the output should follow standard restrictions.

Origami (folding paper) is a creative form of art. As far as I know, master of Origami prefers square paper. Let's start from beginning - convert a rectangular paper to a square one.

• This is a code-golf so shortest code wins
• Pay attention to standard loopholes
• It's your freedom to decide how to deal with input and output but they should follow standard restrictions.

• This is a code-golf so shortest code wins
• Standard restrictions apply
• It's your freedom to decide how to read input and write output

• This is a code-golf so shortest code wins
• Pay attention to standard loopholes
• It's your freedom to decide how to read input and the output should follow standard restrictions.