
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
The library of a school bought 140 new books, ending up with $\frac{27}{25}$ of the number of books it had before the purchase. The number of books before this purchase was:
(a) 1750 ;
(b) 2500 ;
(c) 2780 ;
(d) 2140 ;
(e) 1140.

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