
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 surface of the Earth consists of 70% water and 30% land. Two-fifths of the land are deserts or covered by ice, and one-third of the land is pasture, forest, or mountains; the rest of the land is cultivated. What percentage of the total surface of the Earth is cultivated?

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