*

(* &rest numbers)

Returns the product of its arguments, or 1 with no arguments. The result is an integer when all arguments are integers, exact when ratios are involved, and a float if any argument is a float. Integer results promote to big integers on overflow, on every backend. The product runs left to right one pair at a time, so the arguments ahead of the first float multiply exactly and only their product turns into a float: (* 1/10 3 1.0) is 0.3, as in SBCL.