There is an 8-liter flask full of wine, an empty flask of 5 liters and an empty flask of 3 liters. How to divide the fruit wine into 4 liters on average?
The method is as follows: 1. A wine bottle filled with 3 liters; 2. Introduce 3 liters of wine into a 5 liter wine bottle; 3. Fill three original wine bottles again; 4. After the wine in the 3-liter bottle is introduced into the 5-liter bottle again, the remaining 65,438+0 liters in the 3-liter bottle; 5. Pour the wine from the 5-liter bottle back to the 8-liter bottle; 6. Pour 1 liter of wine in a 3-liter wine bottle into a 5-liter wine bottle; 6. Fill the 3-liter bottle from the 8-liter bottle again; 7 Pour the wine from the 3-liter bottle into the 5-liter bottle. At this time, the 5-liter bottle and the 8-liter bottle are 4 liters each.