Oh, dude, you're trying to round 4000 to the nearest hundred? That's like asking me to choose between eating a whole Pizza or just one slice. Anyway, when you round 4000 to the nearest hundred, it stays as 4000 because it's already a multiple of 100. So, no need to break a sweat over this one!
4000
4000
4000
4000
4000/10 = 400
4000 A is 400 Amps.
4000
It is then 4000 when rounded to the nearest thousand
4000
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4000