rprogn, 262 bytes

Result

AC

Duration

479ms

Code [DL]

read "%d+" ↔ O "l" = O "k" = O "j" = [
read "%d+" ↔ O l - "c" = O k - "b" = O j - "a" = [
read "%d+" ↔ O l - "f" = O k - "e" = O j - "d" = [
read "%d+" ↔ O l - "i" = O k - "h" = O j - "g" = [
a e i * h f * - * b f g * i d * - * c d h * g e * - * + + 6 //

stdin

23 92 06
19 14 30
77 98 30
76 66 74

stdout

23624

stderr

strace