∣200030004∣\left|\begin{array}{lll}2 & 0 & 0 \\0 & 3 & 0 \\0 & 0 & 4\end{array}\right|200030004
[22000110005]\left[\begin{array}{rrr}22 & 0 & 0 \\0 & 11 & 0 \\0 & 0 & 5\end{array}\right]22000110005
[−11000−220005]\left[\begin{array}{rrr}-11 & 0 & 0 \\0 & -22 & 0 \\0 & 0 & 5\end{array}\right]−11000−220005
[11000220005]\left[\begin{array}{rrr}11 & 0 & 0 \\0 & 22 & 0 \\0 & 0 & 5\end{array}\right]11000220005