Solve the formula for the specified variable. \[ K=n d^{2} \text { for } n \] \[ n= \]

Step 1 ：Given the formula \(K = nd^2\) for \(n\).

Step 2 ：To solve for \(n\), we need to isolate \(n\) on one side of the equation. We can do this by dividing both sides of the equation by \(d^2\).

Step 3 ：The solution to the equation \(K = nd^2\) for \(n\) is \(\boxed{\frac{K}{d^2}}\)