To multiply the fractions \( \frac{5}{6} \) and \( \frac{1}{8} \), you multiply the numerators together and the denominators together.
\[ \frac{5}{6} \times \frac{1}{8} = \frac{5 \times 1}{6 \times 8} = \frac{5}{48} \]
Therefore, the answer is:
\[ \frac{5}{48} \]
So, in the form \([?]/[?]\), the answer is \([5]/[48]\).