
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
Using a steel bar that is 18m long to form a rectangular frame, with the ratio of the length to the width of the rectangle being 2:1, the maximum volume of this rectangular solid is \_\_\_\_\_\_.

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