10389! 4570! 44289! 11800! ------------------------------ 56089! 989! 9400! 43300! 2400! becomes 44289! 11800! 10389! 4570! ------------------------------ 56089! 43300! 9400! 2400! 989! (||10389..9401) (||4570..2401) --------------------------------------------- (||56089..44290) (||43300..11801) 989! where (||m..n) indicates the product of the series