If you had a 5 liter bowl and 3 liter bowl,and an unlimited access to water,how much would you measure exactly 4 liters?

1) Fill the 3 ltr bowl and put it in the 5 ltr bowl
2)  Fill the 3 ltr bowl again and put it is 5 ltr bowl
3)  one ltr will left in 3 ltr bowl.
4) now empty the 5 ltr bowl
5) now pour one ltr in the 5 ltr bowl  (as shown at sl.3)
6) you have now one ltr in 5 ltr bowl..
7) fill the 3 ltr bowl in 5 ltr bowl...  4 ltr is measured