Many times we all have tasks to do.  When a job goes smoothly, without any problems or unexpected difficulties, it can be said to have been ‘as simple as 1-2-3’.

那工作簡單到不行，極容易上手！

有什麼事比數 1, 2, 3 還容易呢？時下流行「簡單到不行」的說法，無非就是：簡單到了極點；非常容易；易如反掌折枝；小事一樁，舉手之勞。A piece of cake!