To find the product of \( \sqrt{36} \) and \( \frac{1}{2} \), let's first simplify \( \sqrt{36} \).
\[ \sqrt{36} = 6 \]
Now, we can multiply:
\[ 6 \times \frac{1}{2} = 3 \]
The result \( 3 \) is a rational number.
Thus, the type of number will be described by the option rational.