bash-busybox, 135 bytes

Result

WA

Duration

496ms

Code [DL]

read j k l
read a b c
read d e f
read g h i
echo $[(a-=j)*(e-=k)*(i-=l)+(b-=k)*(f-=l)*(g-=j)+(c-=l)*(d-=j)*(h-=k)-a*h*f-b*i*d-c*g*e)/6]

stdin

61 29 82
59 03 35
18 13 42
94 01 10

stdout

stderr

/volume/CODE: line 5: (a-=j)*(e-=k)*(i-=l)+(b-=k)*(f-=l)*(g-=j)+(c-=l)*(d-=j)*(h-=k)-a*h*f-b*i*d-c*g*e)/6: syntax error in expression (error token is ")/6")

strace