The vectors from origin to the points $\mathrm{A}$ and $\mathrm{B}$  are $\overrightarrow{\mathit{A}}=3\hat{\mathrm{i}}-6\hat{\mathrm{j}}+2\hat{\mathrm{k}}$ and $\overrightarrow{\mathit{B}}=2\hat{\mathrm{i}}+\hat{\mathrm{j}}-2\hat{\mathrm{k}}$, respectively. The area of the$△\mathrm{OAB}$ is