Dynamic Burn

Lose belly fat in 30 minutes or less with these calorie burning, fat torching workouts utilizing this one unique trick. No need for fancy gym equipment. You can do these workouts in the comfort and privacy of your own home.
Dynamic Burn

How long would the Sun burn if it was a huge fire releasing chemical energy?

Assume that the Sun begins with 10^8 joules per kilogram.
The Sun is 1.99*10^30 kg.
I have no idea what formula to use.