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: Sara had 21 quarters in her bank . Her dad gave her 49 more quarters . How many quarters does she have now ?

SOLUTION: 70

PROBLEM: Dan has 29 violet balloons . Tim has 7 times more violet balloons than Dan . How many violet balloons does Tim have ?

SOLUTION: 203

PROBLEM: Kenji and his classmates placed colored blocks on a scale during a science lab . The yellow block weighed 0.6 pounds and the green block weighed 0.4 pounds . How much more did the yellow block weigh than the green block ?

SOLUTION:
0.2