According to this website (in Chinese, my translation to English follows, original Chinese below)
In 1988, 76 Nobel prize winners gathered together, including the 46 year old Hawking. The interviewer asked Mr Hawking:
"In which university or laboratory did you learn the most important knowledge?"
"I learned the most important knowledge in nursery. Give half of my stuff to my friends. Don't take things that are not mine. Keep tidy… all I learned are these."
"Hawking: Everything I learned in kindergarten is a hundred times more important than any university", Sohu.com, 2019-12-25 19:00 https://www.sohu.com/a/362761642_611018
Did Stephen Hawking ever say anything resembling this during an interview in a major event?