Yes!!!
The expression "x!" means x(x-1)(x-2)(x-3)...1
So 10! means 10(10-1)(10-2)(10-3)(10-4)(10-5)(10-6)(10-7)(10-8)(10-9)=
10*9*8*7*6*5*4*3*2*1=10!,
which means it is correct.
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