春秋乱弹

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:
        0 x 9 + 1 = 1
        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
  123456789 x 9+10 = 1111111111

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:

                     0x 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