A quote from the article: "Just $1 million invested in a dynasty trust, and earning 12 percent a year, would swell to $1.9 billion in 85 years". So my question

A quote from the article: "Just $1 million invested in a dynasty trust, and earning 12 percent a year, would swell to $1.9 billion in 85 years". So my question is how do I find a investment vehicle that gives me 12% return compounded year after year?