
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
Teacher Zhang brought some money to buy pens. After arriving at the store, he discovered that the pens were discounted by 25%, and the money he brought was just enough to buy 25 more pens than originally expected. How many pens could he have bought with this money before the discount?

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