> At the time of their marriage in 1994, Bill Gates’s fortune was worth approximately $9.35 billion.

https://www.wsfamilylaw.com/the-multibillion-dollar-gates-di...

> Gates became the world's then-youngest billionaire in 1987, at age 31.

https://en.wikipedia.org/wiki/Bill_Gates

If you had tried sourcing your claim, you would know it was wrong.