Find the area in the plane contained by the graph of
\[|x + y| + |x - y| \le 4.\]
<|im_start|>system
You are a helpful assistant.<|im_end|>
<|im_start|>user
Find the area in the plane contained by the graph of
\[|x + y| + |x - y| \le 4.\]
Please reason step by step, and put your final answer within \boxed{{}}.<|im_end|>
<|im_start|>assistant

user
16
Find the area in the plane contained by the graph of
\[|x + y| + |x - y| \le 4.\]
train