user
Task

Produce a formatted   12×12   multiplication table of the kind memorized by rote when in primary (or elementary) school.

Only print the top half triangle of products.
assistant
(formerly Perl 6)

```
(my $f = "%{$_}s" given my $width = ($_**2).chars ) given my $max = 12;

say '×'.fmt($f)  ~ ' ┃ ' ~ (1..$max).fmt($f);
say '━' x $width ~ '━╋'  ~ '━' x $max × (1+$width);

for 1..$max -> $i {
    say $i.fmt($f) ~ ' ┃ ' ~ ( $i ≤ $_ ?? $i×$_ !! '' for 1..$max ).fmt($f);
}
```

Output:

```
  x│   1   2   3   4   5   6   7   8   9  10  11  12
───┼────────────────────────────────────────────────
  1│   1   2   3   4   5   6   7   8   9  10  11  12
  2│       4   6   8  10  12  14  16  18  20  22  24
  3│           9  12  15  18  21  24  27  30  33  36
  4│              16  20  24  28  32  36  40  44  48
  5│                  25  30  35  40  45  50  55  60
  6│                      36  42  48  54  60  66  72
  7│                          49  56  63  70  77  84
  8│                              64  72  80  88  96
  9│                                  81  90  99 108
 10│                                     100 110 120
 11│                                         121 132
 12│                                             144

```