how to get 60 using only the numbers 1,9,8,9?

Question

the 1989 must be arranged accordingly to what is given in the formula to get 60

Answer 1

[(√9)!/.1]^(9-8)

[3!/.1]^(9-8)

[(3*2*1)/.1]^1

[6/.1]^1

[60/1]^1

60^1

60