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

[EX Q]: Problem: a car started running at a speed of 30 km / hr and the speed of the car was increased by 2 km / hr at the end of every hour . find the total distance covered by the car in the first 11 hours of the journey .
[EX A]: 440 km

[EX Q]: Problem: a man can do a piece of work in 7 days , but with the help of his son , he can finish it in 3 days . in what time can the son do it alone ?
[EX A]: 4 1 / 5

[EX Q]: Problem: what is the sum of the digits of integer k , if k = ( 10 ^ 45 - 46 )
[EX A]:
396