Given that the determinant of the matrix \(\left[ {\begin{array}{*{20}{c}} 1&3&0\\ 2&6&4\\ { - 1}&0&2 \end{array}} \right]\) is -12, the determinant of the matrix \(\left[ {\begin{array}{*{20}{c}} 2&6&0\\ 4&{12}&8\\ { - 2}&0&4 \end{array}} \right]\) is