rprogn, 274 bytes

Result

AC

Duration

483ms

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 * * b f g * * c d h * * + + a h f * * b i d * * c g e * * + + - 6 //

stdin

62 39 78
80 94 53
02 69 06
21 79 36

stdout

13695

stderr

strace