Correct Rakats for namaz?

Re: Correct Rakats for namaz?

Well according my belief , after takbiraat , ya recite Isteftah dua , which goes like

'' Subhanaakal-lahumma wabihamdikaa watabarakas-muka wata Aaala jadduka wala ilaha ghayruk

then ya recite opening surah or surah-e-fatheya !