Let $\mathbf{u}=\langle 1,1\rangle$ Find the Vector V Such That $\mathbf{u} * \mathbf{v}=8$

Let $\mathbf{u}=\langle 1,1\rangle$
Find the vector v such that $\mathbf{u} * \mathbf{v}=8$
and $|\mathbf{v}|=\sqrt{32}$