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>    3 x 37 = 111
>    6 x 37 = 222
>    9 x 37 = 333
>   12 x 37 = 444
>   15 x 37 = 555
>   18 x 37 = 666
>   21 x 37 = 777
>   24 x 37 = 888
>   27 x 37 = 999
>
>  Nice one:
>  111.111.111  x  111.111.111 = 12.345.678.987.654.321
>
>  Trapeze:
>                            1 x 9 + 2 = 11
>                          12 x 9 + 3 = 111
>                        123 x 9 + 4 = 1111
>                      1234 x 9 + 5 = 11111
>                    12345 x 9 + 6 = 111111
>                  123456 x 9 + 7 = 1111111
>                1234567 x 9 + 8 = 11111111
>              12345678 x 9 + 9 = 111111111
>
>   another Trapeze:
>                            1 x 8 + 1 = 9
>                          12 x 8 + 2 = 98
>                        123 x 8 + 3 = 987
>                      1234 x 8 + 4 = 9876
>                    12345 x 8 + 5 = 98765
>                  123456 x 8 + 6 = 987654
>                1234567 x 8 + 7 = 9876543
>              12345678 x 8 + 8 = 98765432
>            123456789 x 8 + 9 = 987654321
>
>   and another one:
>
>                                   0 x 9 + 8 = 8
>                                  9 x 9 + 7 = 88
>                                98 x 9 + 6 = 888
>                              987 x 9 + 5 = 8888
>                            9876 x 9 + 4 = 88888
>                          9876 5 x 9 + 3 = 888888
>                        987654 x 9 + 2 = 8888888
>                      9876543 x 9 + 1 = 88888888
>                    98765432 x 9 + 0 = 888888888
>                 987654321 x 9 - 1  = 8888888888
>               9876543210 x 9 - 2  = 88888888888
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