TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: Problem: how much interest will $ 10,000 earn in 9 months at an annual rate of 4 % ?

SOLUTION: $ 300

PROBLEM: Problem: a rectangle having length 105 cm and width 40 cm . if the length of the rectangle is increased by twenty five percent then how much percent the breadth should be decreased so as to maintain the same area .

SOLUTION: 19.23 %

PROBLEM: Problem: 210 students were asked in a survey if they preferred windows or mac brand computers . 60 students claimed that they preferred mac to windows brand computers . one third as many of the students who preferred mac to windows , equally preferred both brands . 90 of the students had no preference . how many of the students in the survey preferred windows to mac brand computers ?

SOLUTION:
40