prompt >> java Factorial
Factorial  0! =          1
Factorial  1! =          1
Factorial  2! =          2
Factorial  3! =          6
Factorial  4! =         24
Factorial  5! =        120
Factorial  6! =        720
Factorial  7! =       5040
Factorial  8! =      40320
Factorial  9! =     362880
Factorial 10! =    3628800

Demonstrate factorials in arithmetic expressions
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Four fours:  7 =          7
Four fours: 13 =         13
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