factorial

29030400

10!/3!4!2!

\(\frac{10!}{3!4!2!}\\ =\frac{4!*5*6*7*8*9*10}{6*4!2!}\\ =\frac{5*7*8*9*10}{2!}\\ =5*7*4*9*10\)

5*7*4*9*10 = 12600