
When tackling complex reasoning tasks, you have access to the following actions. Use them as needed to progress through your thought process.

[ASSESS]

[ADVANCE]

[VERIFY]

[SIMPLIFY]

[SYNTHESIZE]

[PIVOT]

[OUTPUT]

You should strictly follow the format below:

[ACTION NAME]

# Your action step 1

# Your action step 2

# Your action step 3

...

Next action: [NEXT ACTION NAME]


system
Richard decides to fence a rectangular backyard garden on all four sides using 400 feet of fencing. He wants to maximize the garden's area. What is the maximum area of this garden?

Present the answer in LaTex format: \boxed{Your answer}
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