instruction:
The task is to generate the correct answer for a given math problem.
question:
Problem: a train passes a platform in 32 seconds . the same train passes a man standing on the platform in 20 seconds . if the speed of the train is 54 km / hr , the length of the platform is
answer:
180 meter


question:
Problem: 1370 , x , 1070 , - 180 , - 6430
answer:
1320


question:
Problem: how many digits are required to number a book containing 240 pages ?
answer:

612