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It is a special case of multiplication by a positive integer.
A multiplication problem's answer is called a product. For a addition or subtraction problem it is called a sum.
I don't know if it should be called "preference", but if an expression has both multiplication and addition in it, then the multiplication has to be done first. This is only because you'll get the wrong answer the other way, not because there's anything preferable about multiplication.
PEMDAS- Parentheses, Exponents, Multiplication and Division, Addition and Subtraction
BIDMAS which is sometimes called BODMAS