What happens to the determinant of a matrix when a row of the matrix is multiplied by a constant?

What will happen to the following matrix if the third row is multiplied by 3?

3 3 3
1 5 6
3 4 5


Also, in general, how does scaling a row of a square matrix affect its determinant?

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If you multiply a row by $n$, the determinant is multiplied by $n$.