1- filled the big jar
2- moved water from big jar 2 small jar
3- emptied the smaller jar
4- moved water from big jar 2 small jar
5- Filled Big Jar
6- Moved water from Big to smaller jar...
7- Emptied the smaller jar ...
8- Moved water from Big Jar to smaller one ...
9- Filler Big jar again...
10- Moved water from bigger one to smaller ...

and Bigger jar contains 6 litters now ...