
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
A hemisphere has a cylindrical hole with radius 3 units running from the flat side to the curved surface. The radius of the hemisphere is 15 units. Calculate the total surface area of this modified hemisphere. Express your answer in terms of $\pi$.

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