kotlin, 228 bytes

Result

WA

Duration

5406ms

Code [DL]

fun main(args:Array<String>){
val a=(0..3).flatMap{_->readLine()!!.split(" ").map{a->a.toInt()}}
for(z in 8 downTo 0)a[z]-=a[9+z%3]
println(-(a[7]*(a[3]*a[2]-a[0]*a[5])+a[6]*(a[1]*a[5]-a[4]*a[2])+a[8]*(a[0]*a[4]-a[3]*a[1]))/6)
}

stdin

34 09 58
89 45 84
19 09 07
24 45 89

stdout

stderr

/tmp/code.kt:3:22: error: no set method providing array access
for(z in 8 downTo 0)a[z]-=a[9+z%3]
                     ^
Error: Unable to access jarfile code.jar
rm: can't remove '/tmp/code.jar': No such file or directory

strace