TASK DEFINITION: The task is to generate the correct answer for a given math problem.
PROBLEM: 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 ?

SOLUTION: $ 1,400

PROBLEM: Problem: a rectangle having length 89 cm and width 34 cm . if the length of the rectangle is increased by eighty percent then how much percent the breadth should be decreased so as to maintain the same area .

SOLUTION: 47.33 %

PROBLEM: Problem: what is the units digit of ( 3 ^ 16 ) ( 4 ^ 13 ) ?

SOLUTION:
4