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.

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

Example Input: Carolyn starts with 47 marbles and 6 oranges . She shares 42 with Diana . How many marbles does Carolyn end with ?
Example Output: 5

Example Input: In Mr. Olsen 's mathematics class , 0.7 the students received A 's and 0.2 received B 's . What fraction of the students received either A 's or B 's ?
Example Output:
0.9