If the price keeps going up I'll smoke half a cigarette at a time.
If the cost keeps increasing I'll smoke half a cigarette at a time.
「値」→「Price, cost」
「上がる」→「To go up, to increase」
「一本のたばこを二回に分けて吸う」→「Smoke half a cigarette at a time」
まとめて言いますと、
「If the price keeps going up I'll smoke half a cigarette at a time.」
「If the cost keeps increasing I'll smoke half a cigarette at a time.」
になります。
シンガポール 
