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

Input: Consider Input: 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 ?

Output: 4 1 / 5


Input: Consider Input: Problem: what is the dividend . divisor 13 , the quotient is 17 and the remainder is 1

Output: 222


Input: Consider Input: Problem: if the price of a certain bond on may 1 st was 3 / 4 the price of the bond on june 1 st and the price of the bond on july 1 st was 25 % greater than the price of the bond on may 1 st . then the price of the bond on june 1 st st was what percent of the average ( arithmetic mean ) price of the bond on may 1 st and july 1 st ?


Output: 118.5 %