Task: Question Answering
Input (English): Problem: if a, b, and c are positive real numbers such that a ( b + c. = 152, b ( c + a. = 162, and c ( a + b. = 170, then abc is
Options: a. a. 672, b. b. 688, c. c. 704, d. d. 720, e. e. 750
Output (English): d