$\begin{aligned} \frac{8 !}{6 ! \times 2 !} &=\frac{8 \times 7 \times 6 \times 5 \times 4 \times 3 \times 2 \times 1}{(6 \times 5 \times 4 \times 3 \times 2 \times 1) \times(2 \times 1)} \\ &=\frac{8 \times 7}{2 \times 1}=28 \end{aligned}$