
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
Nikolai walked to the math competition, covering 100 meters per minute. After 36 minutes, he crossed the threshold of school No. 15. Then he remembered that he forgot his pen at home, which he used to win the school competition, and ran back home at a speed of 3 meters per second. How much time did he spend on the return journey?

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