Question 1107603
9! = 1 x 2 x 3 x 4 x 5 x 6 x 7 x 8 x 9 
(9-6)! = 3! = 1 x 2 x 3
6! = 1 x 2 x 3 x 4 x 5 x 6
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A factorial (indicated by the sign !) means the product of all the whole numbers from 1 to n, so it's 1 x 2 x 3 x .... n
Look at your calculator and see if it has a factorial (!) key (mine does). If not, find the factorials then do the rest of the operations and if you do them right you will get 84.
NOTE: You don't have to do 1 times 2, skip the 1. Any number multiplied by 1 = the number, so there's no point doing 1 x 2 = 2. Just begin with 2 x 3.