
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
In a sea area of $10,000km^{2}$, there are $40km^{2}$ of continental shelf with oil reserves. Determine the probability of reaching the oil layer when drilling is carried out at any point in the sea area.

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