if n is a positive integer and the product of all integers from 1 to n , inclusive , is a multiple of 840 , what is the least possible value of n ?
840 = 2 * 2 * 2 * 3 * 5 * 7 , so n must be at least 7 . the answer is c .
divide(divide(divide(divide(840, const_2), const_3), const_4), divide(const_10, const_2))