The ride report after the exercise shows energy units as kCal, but the value displayed is in kJ.
Suggestion to use kJ as is shown in other parts.
Alternatively apply the correct conversion factor to kCal as this seems to be the preferred unit when talking about food.
The current conversion from kCal to Pizza Slices seems correct, however with the correction above the calculated amount of burnt pizza slices will unfortunately go down too.
Oh well, more riding to be done 
Cheers