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

Input: Consider Input: Problem: jack and jill are marathon runners . jack can finish a marathon ( 42 km ) in 7 hours and jill can run a marathon in 4.2 hours . what is the ratio of their average running speed ? ( jack : jill )

Output: 5 / 5


Input: Consider Input: Problem: if sharon ' s weekly salary increased by 16 percent , she would earn $ 348 per week . if instead , her weekly salary were to increase by 15 percent , how much would she earn per week ?

Output: $ 345


Input: Consider Input: Problem: the average age of 28 students in a group is 12 years . when teacher â € ™ s age is included to it , the average increases by one . what is the teacher â € ™ s age in years ?


Output: 41