There are 26 letters in the alphabet, ABCDEFGHIJKLMNOPQRSTUVWXYZ There are 10 digits, 0,1,2,3,4,5,6,7,8,9 Choose the 1st thing, a letter, 26 ways. Choose the 2nd thing, a letter, 26 ways. Choose the 3rd thing, a digit, 10 ways. Choose the 4th thing, a digit, 10 ways. Choose the 5th thing, a digit, 10 ways. Choose the 6th thing, a digit, 10 ways. Choose the 7th thing, a letter, 26 ways. Choose the 8th thing, a letter, 26 ways. 26•26•10•10•10•10•26•26 = 4569760000 Edwin