
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 certain type of ray, when passing through a glass plate, attenuates to $\text{a}\%$ of its original intensity for every $1 \mathrm{~mm}$ of thickness. It was found that stacking 10 pieces of $1 \mathrm{~mm}$ thick glass plates results in the same ray intensity as passing through a single $11 \mathrm{~mm}$ thick glass plate. This indicates that the gaps between the plates also cause attenuation. How many pieces of $1 \mathrm{~mm}$ thick glass plates need to be stacked together to ensure the ray intensity is not greater than that passing through a single $20 \mathrm{~mm}$ thick glass plate? (Note: Assume the attenuation effect of each gap between plates is the same.)

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