
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 small bottle of shampoo can hold $45$ milliliters of shampoo, whereas a large bottle can hold $630$ milliliters. Kevin wants to buy the minimum number of small bottles necessary to completely fill two large bottles, one with $630$ milliliters and another with $850$ milliliters of shampoo. Determine the number of small bottles he must buy.

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