Task: Question Answering
Input (English): Question: John can do a piece of work in 30 days while michael can do it in 40 days. In how many days will they finish it together?

 Option A: 17 1/7 days

 Option B: 27 1/7 days

 Option C: 23 2/7 days

 Option D: 16 4/11 days

 Option E: 17 5/11 days
Output (English): Option A