
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
Zhang Qiang rides a bike starting from bus stop $A$, traveling along the bus route at 250 meters per minute. After some time, a bus also departs from stop $A$, traveling at 450 meters per minute, but it needs to stop at a station for 1 minute every 6 minutes. If the bus catches up to Zhang Qiang 15 minutes after it starts, what is the distance Zhang Qiang had already ridden when the bus started?

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