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.

The value of a sport utility vehicle this year is 16000 dollars , which is 0.8 of what its value was last year . How much is the value of the vehicle last year ?
20000

Ralph collects 4 cards . Ralph 's father gives Ralph 8 more . How many cards does Ralph have ?
12

18 children were riding on the bus . At the bus stop , some more children got on the bus . Then there were 25 children altogether on the bus . How many children got on the bus at the bus stop ?

7

