+1.00	1.00
*2.00	2.00
*3.00	6.00
*4.00	24.00
*5.00	120.00
*6.00	720.00
*7.00	5,040.00
*8.00	40,320.00
*9.00	362,880.00
*10.00	3,628,800.00
*11.00	 ** overflow
/12.00	1,789,569.70