
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 train that is 280 meters long passes over a bridge at a speed of 18 meters per second. From the moment the tail of the train reaches the bridge until the head of the train leaves the bridge, it takes 20 seconds. How long is the bridge?

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