rprogn, 162 bytes

Result

WA

Duration

493ms

Code [DL]

read "v1" =
read "v2" =
read "v3" =
read "v4" =

v1 0 index v1 1 index 10 * + p "x3" =
v1 3 index v1 4 index 10 * + p "x2" =
v1 6 index v1 7 index 10 * + p "x1" =

stdin

71 95 07
94 05 95
69 98 58
54 32 26

stdout

77.0
 90.0
 0.0

stderr

strace