
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
The speed of light is approximately $3\times 10^{5}km/s$. It takes 4 years for the light emitted by the closest star outside the solar system (Proxima Centauri) to reach the Earth. If one year is calculated as $3\times 10^{7}s$, then the distance from this star to Earth is ______ $km$.

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