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

Example Input: Problem: the speed of a car is 85 km in the first hour and 45 km in the second hour . what is the average speed of the car ?
Example Output: 65 kmph

Example Input: Problem: ajay can ride 50 km in 1 hour . in how many hours he can ride 1000 km ?
Example Output: 20 hrs

Example Input: Problem: the length of a rectangular floor is more than its breadth by 200 % . if rs . 300 is required to paint the floor at the rate of rs . 5 per sq m , then what would be the length of the floor ?
Example Output:
13.42