lua, 144 bytes

Result

WA

Duration

481ms

Code [DL]

X={}for i=-3,8 do X[i]=io.read("*n")-(X[i-3]or 0)end
print((X[0]*(X[4]*X[8]-X[5]*X[7])+X[1]*(X[5]*X[6]-X[3]*X[8])+X[2]*(X[3]*X[7]-X[4]*X[6])//6)

stdin

13 24 28
43 74 65
88 03 49
85 18 29

stdout

stderr

/usr/bin/lua5.3: /volume/CODE:2: ')' expected near <eof>

strace