TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: a student chose a number , multiplied it by 2 , then subtracted 138 from the result and got 102 . what was the number he chose ?

SOLUTION: 120

PROBLEM: Problem: a train running at the speed of 70 km / hr crosses a pole in 9 sec . what is the length of the train ?

SOLUTION: 175 m

PROBLEM: Problem: two women can do a work in 4 days . six men can complete the same work in 3 days . what is the ratio between the capacity of a man and a woman ?

SOLUTION:
4 : 9