Translation:There are four chairs.
So, I learned in Rosetta Stone to say "isu ga yonko arimasu", i.e., to use the suffix "ko" (there are many other suffixes, like "dai" for counting machines). It was very confusing since, as I said, there are a lot of different suffixes (and they are kinda crazy, like there is a suffix for elongated objects, one for thin objects, etc.). But now Duolingo offers an easier universal way to count objects! Anyone knows which one is more common? Is such a pain in the ass to use the suffixes...