Problem with simple rotation when use animation of gameobject

Hello guys I have a problem with an animation of a rotation of gameobject.
if I make a 30-degree rotation on the y-axis, and register the start and end-point, when I go into play he make too much rotation and the degrees on inspector are -3.410548e + 07 and not 30.

Do you have any suggestion?

Thank you

well the animations adds “x amount” of rotation each frame, so thats why its not 100% accurate and the higher the step the higher the offset, can you use the Lerp method it will be 100% acurrate or just add ean event at the end of the animation that rounds to int.