
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
In an opaque bag, there are a total of 20 chess pieces, including white and black ones. These chess pieces are identical except for their colors. After mixing the chess pieces in the bag, one piece is randomly drawn, the color is noted, and then the piece is put back into the bag. This process is repeated 100 times, and it is found that 60 times a black chess piece was drawn. Estimate the number of black chess pieces in the bag.

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