mathematic community of SD IT Muh Kendal

tahukah kamu,,,, piramida terbentuk dari perkalian bilangan 1

                    1 x 1                                       =                                              1
                  11 x 11                                     =                                              121
                111 x 111                                    =                                              12321
              1111 x 1111                                   =                                             1234321
            11111 x 11111                                 =                                              123454321    
           111111 x 111111                               =                                              12345654321