If I give my cat 60 grams per day and I fill it to last 3 days, then I put a total of 60*3 = <<60*3=180>>180 grams into her bowl
If the empty bowl weighs 420 grams and I put 180 grams the total weight is = 420+180 = <<420+180=600>>600 grams
If my cat only ate 14 grams then the bowl right now weighs 600-14 = <<600-14=586>>586 grams
#### 586