The default rational type isn't unlimited precision. See my comment at https://www.reddit.com/r/perl/comments/93dabg/perl_6_small_stuff_4_why_perl_isnt_cobol_n

The default rational type isn't unlimited precision. See my comment at https://www.reddit.com/r/perl/comments/93dabg/perl_6_small_stuff_4_why_perl_isnt_cobol_nor/e3e21s4 https://www.reddit.com/r/perl/comments/93dabg/perl_6_small_s... for an explanation and demonstration of P6's approach.