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
        98765 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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