Explaining a little better the answer above... In Japanese, there are different "counters", depending on what kind of things you are countilng, like: General use: 二つ (futatsu) = two objects 1=hitotsu, 2=futatsu, 3=mitsu, 4=yotsu, 5=itsusu, etc. For cylindrical/long objects: 二本 (nihon) = two cylindrical objects 1=ippon, 2=nihon, 3=sanbon, 4=yonhon, 5=gohon, etc. For people: 二人 (futari) = two people 1=hitori, 2=futari, 3=sannin, 4=yonin, 5= gonin, etc. For a more complete list, please visit the link: http://japanese.about.com/library/weekly/aa061001a.htm

i think "fu ta chi" equals to "二つ"("Two") In English, we can say ,"two apples"or "two people", but in Japanese, we have to use different words though they all mean "two" like: りんごが二つがある。(there are two apples.) 　　人が二人がいる。(there are two people.) 　　鉛筆が二本がある。(there are two pencils.)