
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 a pond, a fish farmer first catches 10 fish from the pond, marks each of them, releases them back into the pond, and then catches 100 fish from the pond. If 2 of the 100 fish caught have marks on them, it can be estimated that there are approximately ____ fish in the pond.

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