
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
To estimate the number of fish in his pond, Xiaoming first caught and marked 40 fish from the pond, then released them back. After some time, when the marked fish were thoroughly mixed with the rest of the fish, he caught 300 fish and found 8 of them were marked. Xiaoming estimated that there are ______ fish in his pond.

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