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

Example Input: Problem: what is the sum of the multiples of 4 between 63 and 151 inclusive ?
Example Output: 233

Example Input: Problem: a worker is paid a regular rate of rs . 10 for completing a survey . the worker completes 50 surveys per week . for any survey involving the use of her cellphone , she is paid at a rate of that is 30 % higher than her regular rate . if she completed 35 surveys involving the use of her cellphone , how much did she get that week ?
Example Output: 605

Example Input: Problem: a train 360 m long runs with a speed of 45 km / hr . what time will it take to pass a platform of 140 m long ?
Example Output:
40 sec