The task is to generate the correct answer for a given math problem.

[Q]: Problem: a family pays $ 800 per year for an insurance plan that pays 70 percent of the first $ 1,000 in expenses and 100 percent of all medical expenses thereafter . in any given year , the total amount paid by the family will equal the amount paid by the plan when the family ' s medical expenses total how much ?
[A]: $ 1,400

[Q]: Problem: which number can we add to 425897 to get a number exactly divisible by 456 ?
[A]: 7

[Q]: Problem: there are 28 balls which are red , blue or green . if 12 balls are green and the sum of red balls and green balls is less than 24 , at most how many red balls are there ?
[A]:
11