
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 "Belt and Road" initiative proposed by China will promote mutually beneficial cooperation between China and countries around the world. According to the plan, the total population covered by the "Belt and Road" region is approximately $4,600,000,000$. This number can be expressed in scientific notation as ______.

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