Update README.md

README.md

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 [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT)
 
-A large-scale dataset containing 1,000,000 math problems and solutions for basic arithmetic operations and word problems.
+A large-scale dataset containing 2,000,000 math problems and solutions for basic arithmetic operations and word problems.
 
 ## Dataset Details
 
 - **License:** MIT
 - **Task Category:** Question Answering
 - **Tags:** Math, 1st grade
-- **Size:** 100K < n < 1M 1,000,000 rows)
-- **Split:** Train only (1M rows)
+- **Split:** Train only
 
 ## Dataset Structure
 
 Each example contains two fields:
-- `input`: Math problem in natural language or numerical form
-- `response`: Numerical answer (may include negative numbers and decimals)
+- `question`: Math problem in natural language or numerical form
+- `answer`: Numerical answer (may include negative numbers and decimals)
 
 
 ## Usage