
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
If Peter walks along a moving escalator at his normal speed, it takes 40 seconds to finish riding on the escalator. If Peter walks at twice his normal speed, it takes 30 seconds to finish riding on the escalator. How many seconds does it take for Peter to finish riding on the escalator if he stands still on the escalator?

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