Find the value of the expression when $z=-3$. \[ \frac{4 z-3}{z-2} \] The value is $\square$. (Type an integer or a simplified fraction.)

Step 1 ：Substitute \(z=-3\) into the expression \(\frac{4 z-3}{z-2}\).

Step 2 ：After substitution, the expression becomes \(\frac{4*(-3) - 3}{-3 - 2}\).

Step 3 ：Simplify the expression to get the value 3.

Step 4 ：\(\boxed{3}\) is the final answer.