TASK DEFINITION: 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.
PROBLEM: Fred had 7 dimes in his bank . His sister borrowed 3 of his dimes . How many dimes does Fred have now ?

SOLUTION: 4

PROBLEM: Mike worked 3 hours , each day , for 5 days . How many hours did he work in total ?

SOLUTION: 15

PROBLEM: In March it rained 0.81 inches . It rained 0.35 inches less in April than in March . How much did it rain in April ?

SOLUTION:
0.46