
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 diagonal DB of rectangle ABCD is divided by two parallel lines l and l' into three segments each of length 1. Here, l and l' pass through points A and C respectively and are perpendicular to BD. Calculate the area of ABCD to one decimal place.

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