
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 280-meter-long train travels at a speed of 18 meters per second over a bridge. It takes 20 seconds for the entire train to pass over the bridge, from the moment the rear of the train gets on the bridge until the front of the train leaves the bridge. How long is the bridge?

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