How Much Caffeine Is in a Liter of Coffee?

I usually have Well now it's the thing I have I make a liter of coffee at a time. It doesn't seem to affect me a lot in terms of like you know people say that they have trouble sleeping or whatever any of that kind of stuff. Yeah, so yeah, I mean it's a it's a high amount. You know how much caffeine is in aliter of coffee and this has four hundred six milligrams? So I don't know that's Exactly or what but that's what God Google says.