Wobei hast du denn genau Schwierigkeiten ?
DET([1, 0.4, 0.8; 2, 2, 1; 1, 4, 0.6]) = 1.92
DET([178, 0.4, 0.8; 425, 2, 1; 505, 4, 0.6]) = 153.6
DET([1, 178, 0.8; 2, 425, 1; 1, 505, 0.6]) = 182.4
DET([1, 0.4, 178; 2, 2, 425; 1, 4, 505]) = 144
153.6 / 1.92 = 80
182.4 / 1.92 = 95
144 / 1.92 = 75