instruction:
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.
question:
For a birthday party Jerry bought 41 regular sodas and 22 diet sodas . If his fridge would only hold 9 on each shelf , how many shelves would he fill up ?
answer:
7


question:
David removes 7 eggs from a jar . There were originally 27 eggs in the jar . How many eggs are left in the jar ?
answer:
20


question:
In 1 week , Mitch 's family drank 0.5 carton of regular milk and 0.1 carton of soy milk . How much milk did they drink in all ?
answer:

0.6