Direct Cubing

This method is simple and easy.

If the number is (ab) its cube can be calculated as

              a³     a²b     ab²    b³

                      2a²b   2ab²     

Sum them up taking care of the carryovers.

Consider (16)³

  Writing it as above

         1     6     36    216

              12     72         

       1     18    108   216

 Considering the carryovers

                   1  0  0  0
                         1  8  0  0
                         1  0  8  0 
                             2  1  6
                        4  0  9  6

Therefore we get the answer as 4096

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