Answer:
The answer is 63 eggs after 3 weeks.
Explanation:
There are 7 days in a week, and 21 days in 3 weeks.
If the chicken lay 3 eggs in one day, all you have to do is 3 times 21, which is 63 eggs in three weeks.
Also:
Where did you get this question? Rooster don't lay eggs...
And if this is a question meant to trick you, the answer could also be 0, because you eat the three eggs everyday for breakfast, and so you will have no eggs because you already ate them... But if it is a normal problem just follow the answer I gave above lol.