
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 steamboat, 2 hours after departing from dock $A$, stops for 1 hour and then continues its journey at a speed that is 0.8 times its initial speed. As a result, it arrives at dock $B$ 3.5 hours late. If the stop had occurred 180 km further, and all other conditions remained the same, the steamboat would have arrived at dock $B$ 1.5 hours late. Find the distance $AB$.

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