
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
Assuming that one third of the Earth's surface is not covered by bodies of water, and only one fourth of that exposed land area is inhabitable for humans due to various geographical constraints, and from the inhabitable land, only 60% is available for residential purposes due to agricultural and industrial use, what fraction of the Earth's surface can humans use for living?

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