
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
We have a spherical onion with a diameter of $4 \mathrm{~cm}$, which is cut into slices each $2 \mathrm{~mm}$ thick. How many times larger is the combined surface area of the 20 slices compared to the original surface area of the onion?

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