
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 ship lock is the crystallization of the wisdom of the working people of our country. The "人" shaped gate of the Three Gorges ship lock is currently the largest giant gate in the world, weighing $867000$ kilograms. Express this in scientific notation as ______ kilograms.

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