I have the equation $\displaystyle Value = 6(0.92)^n$

I need to know what the cost will be when the Value is 1

So I did this

$\displaystyle Value = 6(0.92)^n$

$\displaystyle 1 = 6(0.92)^n$

$\displaystyle 1/6 = 0.92^n$

I'm stuck there. Any help is appreciated!