Which with napkin math can be shown to be bullshit. Students are spending approximately 1/3 of their time in classes, so how would they get time to sleep among the 4/3 required by studies and classes?
1:3 hours sounds super aspirational even for only the hardest of classes like organic chemistry and fluid dynamics.
But your napkin calc isn't addressing the bit where you only take 1-2 classes like that per semester and pad the rest out with things like literature and electives so you could have a life.
