Eric likes to exercise. After jogging 6 rounds around a 400 m track, he jogged another 1646 m. What distance did he jog in total?

(Please leave your anawer in km and round off to 2 decimal places)

The distance Eric jogged around the track is 6 x 400 = <<6*400=2400>>2400 m.

So, the total distance he jogged is 2400 + 1646 = <<2400+1646=4046>>4046 m.
Therefore, Eric jogged a total of 4046/1000 = <<4046/1000=4.05>>4.05 km. Answer: \boxed{4.05}.