stuck, 177 bytes

Result

AC

Duration

497ms

Code [DL]

ssss["x:map(int,x.split())"m["x:[x[i/3+1][i%3]-x[0][i%3] for i in range(9)]"m"x:(x[1]*x[5]*x[6]+x[2]*x[3]*x[7]+x[0]*x[4]*x[8]-x[2]*x[4]*x[6]-x[0]*x[5]*x[7]-x[1]*x[3]*x[8])/6"m0&

stdin

76 24 42
28 62 19
76 08 28
23 48 92

stdout

11662

stderr

strace