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

[EX Q]: Problem: find the area of a parallelogram with base 10 cm and height 20 cm .
[EX A]: 200

[EX Q]: Problem: how many liters of a 40 % iodine solution need to be mixed with 35 liters of a 20 % iodine solution to create a 32 % iodine solution ?
[EX A]: 102

[EX Q]: Problem: a certain sum is invested at simple interest at 18 % p . a . for two years instead of investing at 12 % p . a . for the same time period . therefore the interest received is more by rs . 480 . find the sum ?
[EX A]:
4000