I suspect you missed a unit there - a standard 500ml bottle of coke contains 900kJ or 210kcal.
Somewhat more worrying is the 53g of sugar, which is around 40% of the RDA for men.
Which is roughly equivalent to one standard dairy milk bar (ignoring the fat content, which is substantial).
Not that that is likely to stop me drinking a shedload of it, but it does explain why I don't drink as much any more unless I'm working hard.
The key to the obesity epidemic isn't the sugar in soft drinks and chocolate though. Those are obvious targets, and few people consume huge volumes of them without awareness of the consequences.
The key is in the steadily rising sugar and fat contents in just about everything else you eat. Since salt, sugar and fat trigger favourable taste responses, manufacturers of processed foods add more and more to "enhance flavour", especially for low budget foods that don't taste particularly good without the additives.
Which means you end up blowing out your RDA by noon without even realising it, and a low income family has very little choice in the matter.
The solution isn't as simple as cooking your own food, although that helps, but in paying attention to what you eat and how much of it, and a lot of people simply don't know or don't care to do that. And cooking your own food is expensive - in time, in energy, and in raw ingredients, not to mention transportation and storage of bulk ingredients. Which puts it out of the reach of many of the worst affected, especially pacific islanders.
(This of course doesn't cover genetic and racial predisposition towards metabolising particular foods due to differing biological reactions and intestinal flora - eg. asians and alcohols)