
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
A rectangular mirror (the shaded region) is perfectly centered within a larger frame, which itself is within an even larger frame. The outermost perimeter of the largest frame measures 100 cm by 140 cm. Each side of this frame has a width of 15 cm. Inside this, there is another frame, whose sides are also 15 cm wide. What is the area of the mirror?

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