Can you know their age?

Go through the communication below:
A: How many children do you have
B: Three
A: May I know how old are them?
B: Let's me give you some hint and see whether you can find it out. Three of their age multiply together is 72.
A: The nformation is insufficient for me to get the answer.
B: Is true, you might go out and see my house number, their age add together is equal to my house number
A went out and see the house nymber then return back and say: The information still not enough for confirm your childrens age.
B: Tell you what, my youngest son like to eat cake a lot.
A: I get it, their age is .......

Base on the communication between A & B, could you find out each of the three children age