I tried with the first half of the code. But it is not printing the number.

Another thing is I have many products in the output file. I am calculating the usage of each product.

#!/usr/bin/perl
local $/;
open(DAT, "output1.txt") || die("Could not open file!");
my $line = <DAT>;
my $product;
if ( $line =~ m/Users of/ ) {
       $line =~ m@Product(\d+):@;
       $product = $1;
   print $product;
}
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