
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
Highways have facilitated logistics and travel, building a better life for us. According to data from the Ministry of Transport, as of the end of last year, the total length of highways in China reached 161,000 kilometers, ranking first in the world. The number 161,000 can be expressed in scientific notation as ____.

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