
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
甲 and 乙 are jogging back and forth on a straight road that is 400 meters long, with speeds of 3 meters per second and 2.5 meters per second, respectively. They start simultaneously from opposite ends and head towards each other. How many times do they meet within 20 minutes?

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