
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
Please choose one of the following two sub-questions to answer. If more than one is chosen, only the first one will be scored.

(A) What is the sum of the external angles of an octagon?

(B) A staircase with an inclination angle of $35^\circ$ is planned to be built between floors. If the height between the floors is $2.7$ m, and to save cost, the inclination angle of the staircase is to be increased by $11^\circ$, the length of the sloping surface of the staircase will be reduced by approximately $\_\_\_\_\_\_\_\_$(m (Use a scientific calculator for calculation, and the result should be accurate to $0.01$ m).

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