import java.util.Scanner;
public class Multiplication {
public static void main(String[] args) {
Scanner scanner=new Scanner(System.in);
System.out.println("乘数是:");
int n1= scanner.nextInt();
System.out.println("被乘数是:");
int n2= scanner.nextInt();
System.out.println("两数相乘的结果是:");
int product=0;
if(n1==0||n2==0){
System.out.println("0");
}else if(n1>0&&n2>0){
for (int i = 0; i < n1; i++) {
product=product+n2;
}
System.out.println(product);
}else if(n1<0&&n2>0){
for (int i = 0; i < n2; i++) {
product=product+n1;
}
System.out.println(product);
}else if(n1<0&&n2<0){
for (int i = 0; i < -n1; i++) {
product=product-n2;
}
System.out.println(product);
}else{
for (int i = 0; i < n1; i++) {
product=product+n2;
}
System.out.println(product);
}
}
}