
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
Helen needs to paint 20 right cylindrical pillars. Only the curved surface area of each pillar will be painted as the top and bottom faces are already covered. Each pillar is 25 feet tall and has a diameter of 8 feet. One gallon of paint covers 400 square feet. Considering paint is only sold in full gallons, how many gallons of paint must Helen purchase?

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