rust, 249 bytes

Result

AC

Duration

826ms

Code [DL]

use std::io::*;fn main(){let mut b=[0;36];let _=stdin().read_exact(&mut b);let mut m=[0;12];let mut x=0;for i in 0..12{m[i]=b[i*3]as i32*10+b[i*3+1]as i32-m[i%3];if i>8{x+=m[i]*(m[(i+1)%3+3]*m[(i+2)%3+6]-m[(i+1)%3+6]*m[(i+2)%3+3])}}print!("{}",x/6)}

stdin

26 41 96
04 07 60
09 79 92
27 20 28

stdout

14442

stderr

strace