Vector Algebra: JEE Main 2021 Mathematics question

Let $\overrightarrow a = \widehat i + \widehat j + \widehat k$ and $\overrightarrow b = \widehat j - \widehat k$. If $\overrightarrow c$ is a vector such that $\overrightarrow a \times \overrightarrow c = \overrightarrow b$ and $\overrightarrow a .\overrightarrow c = 3$, then $\overrightarrow a .(\overrightarrow b \times \overrightarrow c )$ is equal to :