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

Input: Consider Input: Problem: at a certain fruit stand , the price of each apple is 40 cents and the price of each orange is 60 cents . mary selects a total of 30 apples and oranges from the fruit stand , and the average ( arithmetic mean ) price of the 30 pieces of fruit is 56 cents . how many oranges must mary put back so that the average price of the pieces of fruit that she keeps is 52 cents ?

Output: 1


Input: Consider Input: Problem: a train 140 m long is running at 60 kmph . in how much time wiu it pass a platform 260 m long ?

Output: 24 sec


Input: Consider Input: Problem: the area of sector of a circle whose radius is 12 metro and whose angle at the center is 30 ° is ?


Output: 37 m 2', 'd ) 38 m 2', 'e ) 40 m 2'