You only have to fill some fields:
1. The actual kilometer, displayed on your speedometer.
2. The date from when the average mileage to be calculated.
3. Optionally, any value from KM-Stand will be deducted if the vehicle already has some KM and was not in your possession (Used car).
4. Just click on Calculate and you get the average daily and annual mileage.
Have fun with it.
The calculation is subject to change. These data are all averages, when a year is much less, and a year is gone, it will calculate only averaged values.