
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 a poem by Yuan Mei from the Qing Dynasty, there is a line that goes: "The white sun does not reach everywhere, but youth comes just in time. Moss flowers as small as grains of rice, also learn to bloom like peonies." If the diameter of the pollen of moss flowers is approximately $0.0000084$ meters, then the number $0.0000084$ expressed in scientific notation is ______.

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