
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
Carlos buys a rectangular canvas (the shaded region) that fits exactly inside a decorative border. The outer dimensions of the border measure 100 cm by 140 cm. The width of each side of the border is 15 cm. What is the area of the canvas?

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