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:
After a party , 0.625 of the cake is left over . That night , big brother eats 0.25 of the cake . How much is left over after that ?

Ex Output:
0.375

Ex Input:
Debra removes 22 apples from a jar . There were originally 57 apples in the jar . How many apples are left in the jar ?

Ex Output:
35

Ex Input:
Mrs. Hilt had 15 cents . She bought a pencil for 11 cents . How much money did she have left ?

Ex Output:
4