No perfect hen lays more than one hen a day...it takes 20-24 hours for an egg to get laid, hence why you get one egg a day from a hen...
The egg or ovum (the yolk)--> which is made up of approx. two thirds fat and about 1 percent protein--> is formed in the follicular sac and then drops into the infundibulum
After leaving the infundibulum , the ovum passes into the large section of the oviduct where thick layers of the albumen and the chalazae form around it.
The ovum moves to the isthmus where it stays for about 2 hours while the first two layers of the shell begin to form. The first two layers consist of soft membrane, the cuticle and the the testa.
The soft membranous egg then passes into the uterus, where it stays for 20-24 hours while the third and final layer, including the pigmentation is formed on the egg.
The egg is then laid.
Therefore one cannot get 6 eggs from 2 hens in a day