lua, 215 bytes

Result

WA

Duration

476ms

Code [DL]

a={}for k=1,4 do for s in string.gmatch(io.read(),"%w+")do a[#a+1]=s end end
for z=1,9 do a[z]=a[z]-a[10+~-z%3]end
s=0
for z=0,2 do p=-~z%3;q=(z+2)%3;s=s+a[z+1]*(a[7+p]*a[4+q]-a[4+p]*a[7+q])end
print(math.seil(s/6))

stdin

45 55 93
08 81 63
82 53 27
63 33 40

stdout

stderr

/usr/bin/lua5.3: /volume/CODE:5: attempt to call a nil value (field 'seil')
stack traceback:
	/volume/CODE:5: in main chunk
	[C]: in ?

strace