Why is there such disparity between the calories in a banana and the calories in this pack of dried banana? If I Google 


  calories in banana


I get the result of 89 per 100g.

However, this pack of chewy banana
says 320 per 100g.

Why the difference? The ingredients are


  Dried Banana, Rice Flour, Preservative (Sulphur Dioxide)


Do rice flour (which I presume is to keep the pieces from sticking) and sulphur dioxide add 3.5x the energy to a pack of dried banana?
Most of the weight in fresh fruit is water, which has no calories.  

When you dry the fruit, the remainder is concentrated, so there are more calories in a given volume or weight. 

Sulfur dioxide is a preservative with anti-microbial properties.   

The claim of 3.6 times the energy is specious.