Have I been prescribed medicine is it the correct dose

hi guys and girls,

 I've just got my first lot of tablets  Aciclovir but reading the leaflet it tells the dose and what that dose is for.

my doc  has given me 800 mg is this correct 

Supposed to be like 3xs a day 800mgs. I've noticed diff countries, the docs give different doses. In the US they give higher doses.

That means I'll be taking 2400 mg a day !?! Seems a lot x

How many times does it say to take it? I've seen where it was 200mlgs twice a day and 400mlgs...