Ответ:

\(5\frac{1}{16}-\frac18=\frac{81}{16}-\frac{2}{16}=\frac{79}{16}\).

\(5\frac56+\frac{3}{14}=\frac{35}{6}+\frac{3}{14}=\frac{245+9}{42}=\frac{127}{21}\).

Произведение: \(\frac{79}{16}\cdot\frac{127}{21}=\frac{10033}{336}=29\frac{289}{336}\).

Ответ: \(\frac{10033}{336}\).