What kind of joke is 1234567 123?

When I got home, I saw my daughter-in-law lecturing her son. The situation is critical, and she is so angry that she is likely to start a prairie fire ~

I quickly asked my daughter-in-law what was going on?

Daughter-in-law: Isn't your son making trouble at school? I said I would hit him. Guess what?

I don't understand: what?

He said, call if you want. I came into this world and didn't intend to go back alive.