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Answers for “平方单位中的指数是应用于数字还是单位?”

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The exponent only applies to the unit of measure, not the numerical value. For example, in 12 ft², the exponent 2 indicates 'square feet', but it does not mean the number 12 is squared.

Conditions: Used when expressing area measurements.

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The area of a rectangle is calculated by multiplying its length by its width, expressed as A=l×wA = l \times w.

Conditions: Applies specifically to rectangles.; Length and width are measured in the same linear unit.