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

Ex Input:
Problem: two trains each 120 m in length each , are running on two parallel lines in opposite directions . if one goes at the speed of 85 km / h while the other travels at 65 km / h . how long will it take for them to pass each other completely .

Ex Output:
10.07 sec


Ex Input:
Problem: if log 2 = 0.3010 and log 3 = 0.4771 then the value of log 4.5 is :

Ex Output:
0.6532


Ex Input:
Problem: the cost of a one - family home was $ 120,000 in 1980 . in 1988 , the price had increased to $ 180,000 . what was the percent increase in the cost of the home ?

Ex Output:

50 %