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

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: two trains travel in opposite directions at 36 kmph and 45 kmph and a man sitting in slower train passes the faster train in 12 seconds . the length of the faster train is

Ex Output:
270 m

Ex Input:
Problem: micheal and adam can do together a piece of work in 20 days . after they have worked together for 15 days micheal stops and adam completes the remaining work in 10 days . in how many days micheal complete the work separately .

Ex Output:
40 days