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

Ex Input:
Problem: how much interest will $ 8,000 earn in 9 months at an annual rate of 6 % ?

Ex Output:
$ 360


Ex Input:
Problem: a square with sides of 15 units each . what would be the area of the square . consider a square as a combination of two right angled triangles .

Ex Output:
225', 'd ) 81', 'e ) 144'


Ex Input:
Problem: the length of the bridge , which a train 155 metres long and travelling at 45 km / hr can cross in 30 seconds , is ?

Ex Output:

220 m