For that strength, you shouldn't take more than two every four hours, and no more than 8 in 24 hours, I suppose the package will say.
The problem with paracetamol is that its effects are delayed. Sometimes until four or five days later. It affects the liver, and can cause liver failure if enough are taken. I've read that the symptoms of liver failure are very unpleasant

. If not liver failure, then still liver damage can occur. If you start to feel nauseous/ vomit, start sweating a lot or feel ill, you should get yourself to the accident and emergency as quickly as possible...