This "sentence" should be split into at least two or three parts. Maybe it's even possible to use the numbers in a context. ;)
The numbers lesson as a whole should be looked at again because of this, in my opinion. There has to be a better way to learn numbers in Esperanto than banging out 100+ characters to ultimately just count to ten.
Esperanto numbers are too easy
I copied and pasted "hundred" while typing this.
This has got to be the longest sentence I've typed in Duolingo.
Thank god for copy + paste =P