
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
When Cheenu was a boy, he could run 20 miles in 4 hours. As a middle-aged man, he could bicycle 30 miles in 2 hours. Now, as an old man, he can walk 8 miles in 4 hours. Determine the difference in time it takes for him to walk a mile now compared to when he bicycled a mile as a middle-aged man.

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