On the eastern part of the campsite, Mr Manuel counted 2*100 = <<2*100=200>>200 tents
The total number of tents in the eastern and the northern part of the campgrounds is 200+100 = <<200+100=300>>300
There are four times as many tents as the northernmost part in the central part of the campsite, which means there are 4*100 = <<4*100=400>>400 tents in the central part of the camp.
The total number of tents in the three parts of the campsite is 400+300 = <<400+300=700>>700
If you add the number of tents Mr. Manuel counted at the southern part of the campsite, you get 700+200 = <<700+200=900>>900 tents on the whole campsite
#### 900