know exactly
The Spanish phrase 'saber al pie de la letra' is typically used in the context of knowing something very well, so much so that it can be accurately quoted verbatim. It can be translated into English as 'to know something by heart'. This expression is often used when referring to textual information, such as song lyrics, poems, scripts, or educational material. However, it can also be applied to any situation where something is fully understood or memorized.
She knows to the letter how to do the homework.
This phrase indicates that she has a complete and precise understanding of how to complete the homework.
The teacher expects the students to know the rules of the game to the letter.
In this context, it means that the teacher wants the students to thoroughly understand and follow all the game rules.
If you want to win, you must know the strategy to the letter.
This phrase suggests that having an exact and thorough knowledge of the strategy is essential for winning.