3. (8 points) Xiaoliang's family bought 72 eggs, and they also have a hen that lays one egg every day. If Xiaoliang's family eats 4 eggs every day, then these eggs will last them for $\qquad$ days.
3. (8 points) Xiaoliang's family bought 72 eggs, and they also have a hen that lays one egg every day. If Xiaoliang's family eats 4 eggs every day, then these eggs will last them for $\qquad$ 24 days.

【Solution】Solution: According to the problem:
Xiaoliang eats 4 eggs every day, and after eating the egg laid by the hen each day, they still need 3 eggs.
$$
72 \div 3=24 \text { (days) }
$$

Therefore, the answer is: 24