Spot on. (британский английский Novoross)

precisely (used to express complete agreement • `So you think we should wait until tomorrow?' `Precisely.); that's true (Ivan Pisarev); for sure (Ivan Pisarev); sure thing (Ivan Pisarev); you bet (Ivan Pisarev); right on (Ivan Pisarev); spot on (Ivan Pisarev); dead right (Ivan Pisarev); no doubt (Ivan Pisarev); without a doubt (Ivan Pisarev); indeed (Ivan Pisarev); correct (Ivan Pisarev); sure enough (Ivan Pisarev); that's for sure (Ivan Pisarev); quite right; quite so; just so!; full well (shergilov); fully well (shergilov); exactly right (bolton926); absolutely (Александр_10); exactly so (Technical); perfectly true (Olga Fomicheva); dead on the money (Хыка); bang on the money (lady_west); quite true (kee46); exactly; you may well say so; indeed! (sh61288); definitely (Александр_10); quite rightly (suburbian); absolutely right

right on (used to say that you agree completely with what someone has said Val_Ships)

very true (в кач. ответа Val_Ships); right as rain (VLZ_58)

that's exactly right (ART Vancouver); that's right (ART Vancouver)