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

Ex Input:
A restaurant served 4 pies during lunch and 9 during dinner today . The restaurant served 7 pies and 2 pizzas yesterday . How many pies were served in total ?

Ex Output:
20

Ex Input:
Sara had 4 quarters and 8 dimes in her bank . Her sister borrowed 4 dimes . How many dimes does Sara have now ?

Ex Output:
4

Ex Input:
Each day , the polar bear at Richmond 's zoo eats 0.2 bucket of trout and 0.4 bucket of salmon . How many buckets of fish does the polar bear eat daily ?

Ex Output:
0.6