Tank indicator Prius III shows empty, and after 36 liters it is full.

Hello dear Priusgemeinschaft, after approx. 3500 km of comfortable streaming around, I have explained a tiny problem to the biggest personal problem. The tank and its display. The Prius III has 45 liters of tank content. The tank display about 8 bars and shortly before the supposed empty flashes the last bar. Problem: at 3.9 Lit/100km (car thrusts in the city) or 4.9 Lit/100km (motorway with changing mountain and descent) one could calculate with 45 liters tank content and also practically almost When refueling, however, the indication of the range shows a range of only 740-770 km depending on the average of the last 50 km. When refueling, 36 litres are sufficient to bring the fuel supply indicator of flashing single beams to full. So one can assume that the Prius III has 9 litres left, although the indicated reserve has been used up. If 9 liters do not mean almost 200 km, it would not be worth mentioning. i Toyota normal, especially with the Auris the customer criticized….” Is there a Prius III with you that cracks the 770 KM range? And most important question: How can you get the workshop to adjust this 150-200 km loss on guarantee? Something like that must be adjustable. Is there a sensor or swimmer in the tank, or is there?