[填空题]
The points A and B have position vec) fzwvbrkx,ko ot1;1x ;fl3-itor5m6feoclrsq :0jg5cb* oo5/ ys $\overrightarrow{\mathrm{OA}}=\left(\begin{array}{c}2 \\ 4 \\ 12\end{array}\right)$ and $ \overrightarrow{\mathrm{OB}}=\left(\begin{array}{l}0 \\ 1 \\ 2\end{array}\right)$ .
1. Find $\overrightarrow{\mathrm{OA}} \times \overrightarrow{\mathrm{OB}}$.$\left(\begin{array}{r}
a \\
b \\
c
\end{array}\right)$ a = b = c =
2. Hence find the area of the triangle OAB .
