Simplify sqrt(18).

We find the largest perfect square factor of 18.
$18 = 9 \times 2$
So, $\sqrt{18} = \sqrt{9 \times 2} = \sqrt{9} \times \sqrt{2} = 3\sqrt{2}$.

We find the largest perfect square factor of 32.
$32 = 16 \times 2$
So, $\sqrt{32} = \sqrt{16 \times 2} = \sqrt{16} \times \sqrt{2} = 4\sqrt{2}$.

Multiply the coefficients and the square roots separately:

Alternatively, we can multiply the numbers inside the square root first:

Now, find the square root of 576.

The final answer is 24.