#!/usr/bin/perl

use strict; # https://perlmonks.org/?node_id=11163460
use warnings;
use List::AllUtils qw( zip_by before );
$SIG{__WARN__} = sub { die @_ };

sub bigdivide
  {
  my ($t, $d) = map s/^0+(?=.)//r, @_;
  my $q = '';
  my @pad = before {
    length $t < length $d . 0 x $_ ||
    length $t == $_ + length $d && $t lt $d . 0 x $_
    } 0 .. length $t;
  for( reverse @pad )
    {
    my $digit = 0;
    while( length $t > $_ + length $d ||
      length $t == $_ + length $d && $t ge $d . 0 x $_ )
      {
      $digit++;
      $t = bigsubtract( $t, $d . 0 x $_ );
      }
    $q .= $digit;
    }
  return $q || 0;
  }

my $xx = '1238888888888888888888888888888888888888888888884555555555888888888888888888888888888555555555555';
my $yy = '555333577778888888888888888888888888887555555';
my $quo = bigdivide($xx, $yy);
print "bigdivide $quo\n";
{
use bigint;
my $tmp = ($xx+0) / ($yy+0);
print "   bigint $tmp\n";
}

sub bigsubtract
  {
  my ($top, $bottom) = map s/^0+(?=.)//r, @_;
  if( length $top > length $bottom ||
    length $top == length $bottom && $top ge $bottom )
    {
    my @top = reverse split //, $top;
    my @bottom = reverse split //, $bottom;
    my $borrow = 0;
    my $answer = reverse join '', zip_by
      {
      my $digit = $_[0] - ($_[1] // 0) - $borrow;
      $borrow = $digit >= 0 ? 0 : 1;
      $digit >= 0 ? $digit : $digit % 10;
      }
      \@top, \@bottom;
    return $answer =~ s/^0+(?=.)//r;
    }
  print "failed\n";
  use Data::Dump 'dd'; dd undef;
  return undef;
  }

##</code><code>##

bigdivide 2230891374953314563617132232227474545270207356483795
   bigint 2230891374953314563617132232227474545270207356483795