The first step: the ten pounds of oil into 3 pounds of empty jugs, and then the 3 pounds of oil into 7 pounds of empty oil jugs, this time: 10 pounds of oil jugs left 7 pounds of oil, 3 pounds of oil jugs are empty, 7 pounds of oil jugs filled with 3 pounds of oil; the second step: the 10 pounds of oil jugs full of 3 kg oil jugs, and then 3 pounds of 3 pounds of oil jugs poured into the 7 pounds of oil jugs, this time: 10 pounds of oil jugs left 4 pounds of oil, 3 kg of oil jugs are empty. 7 pounds of oil in the pot of 6 pounds of oil; Step 3: then 10 pounds of oil in the pot of oil poured 3 pounds of oil in the pot of oil, and then 3 pounds of oil in the pot of oil poured 7 pounds of oil in the pot of oil. At this point: 10 pounds of oil left in the pot 1 pound of oil, 3 pounds of oil left in the pot 2 pounds of oil, 7 pounds of oil in the pot 7 pounds of oil; fourth step: 7 pounds of oil in the pot all the oil poured into 10 pounds of oil in the pot, at this point: 10 pounds of oil in the pot 8 pounds of oil, 3 pounds of oil in the pot 2 pounds of oil, 7 pounds of oil in the pot is empty; the fifth step: 3 pounds of oil in the pot of 2 pounds of oil in the pot of oil in the pot of oil in the pot of oil in the pot of 7 pounds of oil in the pot of oil in the pot of oil in the pot of oil in the pot of oil in the pot of oil in the pot of oil in the pot of oil to fill the 10 pounds of oil in the 3 pounds of oil in the pot of oil. At this point: 5 pounds of oil left in the 10-pound oil jug, 3 pounds of oil in the 3-pound oil jug is 3 pounds of oil, 7 pounds of oil in the 7-pound oil jug 2 pounds of oil; Step 6: 3 pounds of oil in the 3-pound oil jug poured into 7 pounds of oil in the jug. Result: 5 pounds of oil left in the 10-pound kettle, and 5 pounds of oil in the 7-pound kettle. 1. first 7 pounds of barrels filled
2. 7 pounds of barrels filled with 3 pounds of barrels
3. 3 pounds of barrels and then all poured into 10 pounds
4. 7 pounds of the rest of the poured 3 pounds to go to 3 pounds of barrels (7 pounds of barrels left 1 pound)
5. 3 pounds of all the poured into the 10 pounds of
6. 7 pounds of the barrels left 1 pound into 3 pounds
7.
7. Pour the 7-pound bucket full
8. Finally, pour the 7-pound bucket full of 3-pound bucket (the 3-pound bucket would have been 1 pound)
5 pounds of oil will be there, in the 7-pound bucket.
All the rest is poured into the 10-pound bucket, also 5 pounds.