How to use multiply operator in c language

#include<stdio.h>
int main()
{
  int a,b,i;
  int result=0;
  printf("Enter two numbers to be multiplied : ");
  scanf("%d%d",&a,&b);
  for(i=1; i<=b; i++)
  {
      result=result+a;
      printf("%d * %d = %d\n",a,i,result);
  }
  return 0;
}

Enter two numbers to be multiplied : 12
3
12 * 1 = 12
12 * 2 = 24
12 * 3 = 36