TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a man purchased earphone on friday . but he forgot how much it cost . the data he have are mean expenditure of all 7 days is 500 . expenditure on mon , tue , wed , thurs , sat , sun are 450600 , 400500 , 550300 . on friday he purchased 3 things one earphone , one pen and one notebook . pen cost 30 and notebook cost 50 . then what is cost of earphone ?

SOLUTION: 620

PROBLEM: Problem: you enter a weight loss challenge game and manage to lose 13 % of your body weight . for the final weigh in you are forced to wear clothes that add 2 % to your weight . what percentage of weight loss is measured at the final weigh in ?

SOLUTION: 11.26 %

PROBLEM: Problem: how many positive integers less than 5,000 are evenly divisible by neither 14 nor 21 ?

SOLUTION:
4,34