Task: Question Answering
Input (English): Problem: peter invests a sum of money and gets back an amount of $ 815 in 3 years. david invests an equal amount of money and gets an amount of $ 850 in 4 years. if both amounts were invested at the same rate ( simple interest ) what was the sum of money invested ?
Options: a. 670, b. 664, c. 698, d. 744, e. 710
Output (English): e