#!/usr/bin/perl -w
use strict;

my $biggest_number = 987654321;

BIGNUMBER: while ($biggest_number) {

    # Discard all odd numbers (not divisible by 2)
    if ($biggest_number % 2) { $biggest_number--; next BIGNUMBER; }

    my @divisors = split //, $biggest_number;

    # Discard all numbers containing zero
    if (grep {$_ eq "0"} @divisors) { $biggest_number--; next BIGNUMBER; }

    # Discard all numbers with repeated digits
    my %seen = ();
    for (@divisors) {
        if ($seen{$_}++) {
            $biggest_number--; next BIGNUMBER;
        }
    }

    # Get this far, give it a try
    print "Trying $biggest_number...";
    DIVISORS:
    for (@divisors) {
        if ($biggest_number % $_) {
            $biggest_number--;
            print "Failed!\n";
            next BIGNUMBER;
        }
    }
    print "Success!!\n";
    for (@divisors) {
        print "$biggest_number / $_ = ", $biggest_number / $_, "\n";
    }
    exit;
}