pls help

8!/(3!2!)

8 letters total

3 I's

2 N's

1 of everything else

$\frac{8!}{3!2!} = 4 \cdot 7 \cdot 6 \cdot 5 \cdot 4 = 20 \cdot 24 \cdot 7 = 140 \cdot 24 = \boxed{3360}$