The expression you provided is:

$\sqrt{4 \cdot \sqrt{6 \cdot \sqrt{36}}}$

Let's break it down step-by-step:

Step 1: Simplify the innermost square root.

$\sqrt{36} = 6$

Now the expression becomes: $\sqrt{4 \cdot \sqrt{6 \cdot 6}}$

Step 2: Multiply inside the second square root.

$6 \cdot 6 = 36$

Now the expression is: $\sqrt{4 \cdot \sqrt{36}}$

Step 3: Simplify the second square root.

$\sqrt{36} = 6$

Now the expression becomes: $\sqrt{4 \cdot 6}$

Step 4: Multiply inside the square root.

$4 \cdot 6 = 24$

So the expression becomes: $\sqrt{24}$

Step 5: Simplify the square root.

$\sqrt{24} = 2\sqrt{6}$

Thus, the final simplified result is: $2\sqrt{6}$

Let me know if you want further details or have any questions!

Here are five related questions you might find helpful:

1. How do you simplify nested square roots?
2. What are the properties of square roots?
3. How do you simplify $\sqrt{a \cdot b}$?
4. How do you express a square root in its simplest radical form?
5. How do you handle square roots of perfect squares?

Tip: When dealing with nested square roots, always start from the innermost root and work your way outward.