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: At the hardware store , 0.25 the nails are size 2d and 0.5 the nails are size 4d . What fraction of the nails are either size 2d or 4d ?

Answer: 0.75

Question: Rosa had 67 flowers . Andre gave her some more flowers . Now , Rosa has 90 flowers . How many flowers did Andre give to Rosa ?

Answer: 23

Question: Sam had 10 socks . If he threw away 3 old ones that did n't fit and bought 36 new ones , how many socks would he have ?

Answer:
43