I wasn't explicit about this in my previous post and I know some will wonder, so here are some additional tidbits.

1,400 kcal assumes you have a full tank when you start your ride. That means you need a good solid meal in the morning (assuming a morning ride).

Our bodies are capable of digesting and utilizing about 350 calories/hour. If you ingest more than that you'll get indigestion.

Given the above (350 calories) and assuming that you're burning a higher amount of calories/hour (which you undoubtedly will), cycling is a deficit sport -- you're always burning more calories than you can consume and digest.

The best way to fuel is to ingest small amounts of calories frequently. I recommend drinking or gelling or eating a bite of a bar every 10 - 15 minutes (for rides longer than 60 minutes). Unfortunately, many of us stop every hour or so, ingest all our calories while we're stopped, and then don't eat or drink on the bike until we stop again. Not the best way to fuel. This method will lead to indigestion and also won't allow your body to utilize the full calorie load.