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

Example Input: Problem: two cubes have their volumes are in the ratio 1 : 27 . find the ratio of their surface area ?
Example Output: 1 : 9', 'd ) 2 : 7', 'e ) 3 : 11'

Example Input: Problem: excluding stoppages , the speed of the bus is 54 kmph and including stoppages , it is 36 kmph . for how many minutes does the bus stop per hr
Example Output: 20 mi

Example Input: Problem: how many bricks each measuring 22 cm x 10.25 cm x 8 cm , will be needed to build a wall 9 m x 7 m x 10.5 m
Example Output:
3066