Compute $\begin{pmatrix} 4 \\ 5 \\ -1 \end{pmatrix} \times \begin{pmatrix} 4 \\ 5 \\ -1 \end{pmatrix}.$
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Compute $\begin{pmatrix} 4 \\ 5 \\ -1 \end{pmatrix} \times \begin{pmatrix} 4 \\ 5 \\ -1 \end{pmatrix}.$
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
\begin{pmatrix} 0 \\ 0 \\ 0 \end{pmatrix}
Compute $\begin{pmatrix} 4 \\ 5 \\ -1 \end{pmatrix} \times \begin{pmatrix} 4 \\ 5 \\ -1 \end{pmatrix}.$
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