Thks.
But i cant use that way cox
i have 2 file.
FIRST file contain
15
16
17


SECOND file contain
40
46
48

code is :-
set A = `awk '{print $1}' FIRST |awk '{array[NR]=$0} END {print array[x];}'`
set B = `awk '{print $1}' SECOND |awk '{array[NR]=$0} END {print array[x];}'`
set C = `expr $A \* 2 + $B`
echo "$C"

and i wan get outcome is: -
70
78
82

There is another way to edit or nt?