verilog, 227 bytes

Result

WA

Duration

495ms

Code [DL]

module z;integer a,b,c,d,e,f,g,h,i,j,k,l;initial begin;$fscanf(1<<31,"%d%d%d%d%d%d%d%d%d%d%d%d",j,k,l,a,b,c,d,e,f,g,h,i);a-=j;b-=k;c-=l;d-=j;e-=k;f-=l;g-=j;h-=k;i-=l;$write((a*e*i+b*f*g+c*d*h-a*h*f-b*i*d-c*g*e)/6);end
endmodule

stdin

83 10 73
50 73 07
22 73 05
59 22 85

stdout

/tmp/code: Program not runnable, 1 errors.

stderr

/volume/CODE:1: Error: $fscanf() is a system function, it cannot be called as a task.

strace