You could give her a Tums tablet which you can just put into her mouth, chickens can swallow big tablets without problems. Or you could pestle the calcium tablet and sprinkle it over some scrambled eggs.
People calcium tablets work for chickens as well.
Egg binding occurs when the egg does not come out of the chicken but stays inside creating a blockage. Lack of calcium can lead to this situation and administering some extra calcium for up to a week can help the hen to expel the stuck egg. Warm baths help as well as this will relax her abdomen muscles.