You are given a math word problem and you are supposed to apply a single mathematical operators like addition, subtraction, multiplication or division on the numbers embedded in the text to answer the following question and then only report final the numerical answer.

Ex Input:
Cody is 14 years old . His grandmother is 6 times as old as he is . How old is Cody ’ s grandmother ?

Ex Output:
84


Ex Input:
The school is planning a field trip . There are 28 students and 7 seats on each school bus . How many buses are needed to take the trip ?

Ex Output:
4


Ex Input:
Tom has 9 yellow balloons Sara has 8 yellow balloons . How many yellow balloons do they have in total ?

Ex Output:

17