
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
The year 2005 marks the 600th anniversary of the first voyage to the Western Seas by the great Chinese navigator Zheng He, and the first ocean voyage by the great Spanish navigator Columbus was in 1492. Calculate the number of years between these two voyages.

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