Question 544519
it will be 7! 
for 8 digit, (with repetition) the digits given to us to form number will be:-
1,1,1,1,1,1,1,1,2,2,2,2,2,2,2,2,3,3,3,3,3,3,3,3,4,4,4,4,4.......,8,8,8,8,8,8,8,8
the numbers formed will be permutation of 64 object to arrange in eight places.
example 64!/{64-8}! = (64*63*62*61*60*59*58*57)