
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 road is 400 meters long. On both sides of the road, a trash can is placed every 20 meters. Trash cans are not placed at the start and end points, as they are marked with signboards. How many trash cans are placed in total?

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