My husband has stomach cancer he refused treatment,now he is unable to eat solid food?

My husband has stomach cancer he refused treatment,now he is unable to eat solid food , today he has diarria and feels like throwing up ..how long will it be before he dies ..getting weaker.. Cancer was found after he had a heart attack 6 weeks ago ,they found blood in stool and did a biopsy that they found cancer ..he is 79 yrs old..