Let $\mathbf{u}$ and $\mathbf{v}$ be unit vectors, and let $\mathbf{w}$ be a vector such that
\[\mathbf{w} + \mathbf{w} \times \mathbf{u} = \mathbf{v}.\]Find the largest possible value of $(\mathbf{u} \times \mathbf{v}) \cdot \mathbf{w}.$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Let $\mathbf{u}$ and $\mathbf{v}$ be unit vectors, and let $\mathbf{w}$ be a vector such that
\[\mathbf{w} + \mathbf{w} \times \mathbf{u} = \mathbf{v}.\]Find the largest possible value of $(\mathbf{u} \times \mathbf{v}) \cdot \mathbf{w}.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\frac{1}{2}
Let $\mathbf{u}$ and $\mathbf{v}$ be unit vectors, and let $\mathbf{w}$ be a vector such that
\[\mathbf{w} + \mathbf{w} \times \mathbf{u} = \mathbf{v}.\]Find the largest possible value of $(\mathbf{u} \times \mathbf{v}) \cdot \mathbf{w}.$
train