This is the 19347th most frequent Korean word.
알았다고
"알았다고" means "I said I understood" or "I told you I got it."
In this sentence, 알았다고 is used to emphasize that the speaker has already stated their comprehension previously.
알았다고 말했잖아요.
I told you that I understood.
Here, 알았다고 signifies the content of the speaker's response, expressing understanding.
알았다고 대답했어요.
I answered that I understood.
In this usage, 알았다고 represents the implicit dialogue or acknowledgment by the subject implied through their action.