|  | 
 
| 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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