The task is to generate the correct answer for a given math problem.

[EX Q]: Problem: i had rs . 10000 with me . out of this , money i lent some money to a for 2 years at 15 % simple interest . i lent the remaining money to b for an equal number of years at 18 % simple interest . after 2 years , i found that a had given me rs . 360 more as interest as compared to ( b ) the amount of money which i had lent to b must have been
[EX A]: 4000

[EX Q]: Problem: by selling an article for $ 225 a person gains $ 75 . what is the gain % ?
[EX A]: 50 %

[EX Q]: Problem: 0.1 + 0.1 ^ 2 + 0.1 ^ 3 =
[EX A]:
0.111