
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 car drives straight towards a quiet valley at a speed of 72 kilometers per hour. The driver honks the horn, and 4 seconds later, hears an echo. Given that the speed of sound is 340 meters per second, find the distance in meters between the car and the valley when the echo is heard.

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