
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
Melanie has 240 feet of fencing to enclose a rectangular space. She needs the area of this space to be ten times its perimeter. If she uses all her fencing, what is the length of the longest side of the rectangle?

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