The hospital needs 9000-10000 liters a day of fuel. Do you think there is a single power generator connected to the neonatal unit? How are they going to limit the consumption? It’s not really that easy and I bet most of the electricians also left the hospital… Your napkin math is also not taking into account any power losses, etc.
Plus offering 300 liters is laughable. Seriously, your car’s fuel tank is 60+ liters, so Israel offered them 5 car tanks worth of fuel. How generous and humane of them!