There would be 5,681,474,155 dogs left because 1,000,480 minus 5,674 equals 994,806, but 994,806 plus 5,680,480,348 equals 5,681,475,154. Finally, 5,681,475,154 minus 999 equals 5,681,474,155, thus leaving you with your final answer. Hope this helped!
-sciencegeek338