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

Ex Input:
Problem: a man have 8 t - shirt and some pant . he can dress in 72 ways . then tell me the no . of pant that man have .

Ex Output:
9


Ex Input:
Problem: the area of a circular field is 17.56 hectares . find the cost of fencing it at the rate of rs . 7 per metre approximately

Ex Output:
10400


Ex Input:
Problem: 10 % people of a village in sri lanka died by bombardment , 20 % of the remainder left the village on account of fear . if now the population is reduced to 3312 , how much was it in the beginning ?

Ex Output:

e ) 460