Here are some examples:

       a1 = a

       a2 = aa

       a3 = aa2 = aaa
	  :
	  :
       an = aan-1 = aa...a
                   ~~\/~~
                  n factors
Now for some numerical examples:

    104 = (10)(10)(10)(10) = 10 000

    33 = (3)(3)(3) = 27

    132 = (13)(13) = 169

    28 = (2)(2)(2)(2)(2)(2)(2)(2) = 256

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