
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 factory produces three different models of products: A, B, and C, with production quantities of 400, 800, and 600 units, respectively. To inspect the products' quality, 90 units are randomly selected using stratified sampling from all products for inspection. The number of units to be selected from model C is _______.

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