Task: Question Answering
Input (English): Problem: a man two flats for $ 512456 each . on one he gains 20 % while on the other he loses 20 % . how much does he gain or lose in the whole transaction ? 
Options: a ) 10 % , b ) 5 % , c ) 12 % , d ) 6 % , e ) 4 %
Output (English): e