
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
As of the end of April 2023, the $5G$ network in China covers all prefecture-level (and above) cities and county towns. The number of $5G$ mobile phone users has reached $634,000,000$ households. Express the number $634,000,000$ in scientific notation as ______.

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