3

import java.util.*;
public class Product{
 public static void main(String args[]){
  Scanner reader=new Scanner(System.in);
  double pdu=1;
  while(reader.hasNextInt()){
   double x=reader.nextInt();
   pdu=pdu*x;
  }
  System.out.println("所输入的数的乘积是："+pdu);
 }
}