system ("cd /path/to/dirs");
system ("tar -czvf dir1.tgz dir1/");
system ("tar -czvf dir2.tgz dir2/");
system ("tar -czvf dir3.tgz dir3/");

system ("mv /path/to/dirs/dir1.tgz /backup/dir1.tgz");
system ("mv /path/to/dirs/dir2.tgz /backup/dir2.tgz");
system ("mv /path/to/dirs/dir3.tgz /backup/dir3.tgz");