A lot of you however seem to say that it's okay to continue flying on 3 engines. That in theory might be true, but the real question that any sensible pilot should be thinking at that point is, how well will this aircraft fly on 2 engines?
Hence the difference between single engine failure & multiple engine failure. Only one engine fails, a multitude of options & time remain available and a choice of diversion airports - which at this stage does not have to be the nearest one - and re-routing to assure that the airplane is always within a comfortable distance of landing should the situation take a turn for the worse. If/when the 2nd (or 3rd) engine fails that's the time it becomes Land At the Nearest Suitable Airport - not before.