B4R Question time_t to long (multiplication gives wrong value)

         long int sec = (long int)mktime(&timeinfo); // make time_t
        
       //const time_t sec = mktime(&timeinfo); // make time_t
         printf("Time2: %ld\n",sec);
      
      long int ep=(long int)sec;
       printf("Time3: %ld\n",ep);
            
      ep=ep*1000;
       printf("Time4: %ld\n",ep);