
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
In 2017, a city launched the largest scale of rail transit investment and construction in its history, with the expected investment in the city's rail transit reaching RMB \\(51,800,000,000\\). Express \\(51,800,000,000\\) in scientific notation.

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