stuck, 143 bytes

Result

WA

Duration

471ms

Code [DL]

ssss["x:map(int,x.split())"m["s:lambda a,b,c,d,e,f,g,h,i=[s[i/3+1][i%3]-s[0][i%3]for i in range(9)]:(a*e*i+b*f*g+c*d*h-a*h*f-b*i*d-c*g*e)/6"m0&

stdin

46 95 67
60 68 39
40 06 26
26 64 43

stdout

<function <lambda> at 0x7fc9a39851b8>

stderr

strace