Oh, dude, rounding 4628 to the nearest thousand is like a walk in the park! So, 4628 is already in the thousands place, so it stays as 4628. No need to break a sweat on this one!
i would assume 7. if this isn't a trick question.
4628-175 = 4453
4628 add 3175 = 7803
0.0127
7
1000
1000
1000
1000
1000
1000