
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
A fisherman randomly caught 60 large fish in a pond, marked them, and then released them back into the pond. Several days later, he randomly caught another 80 large fish, among which 5 were previously marked. Estimate the total number of large fish in the pond.

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