That's not "math". That's a "wild guess", or baseless extrapolation at best.
My son doubled in size in the first 8 months of his life. At age 12, he will be larger than the Moon.
One of my favorite xkcd
https://xkcd.com/605/
My son doubled in size in the first 8 months of his life. At age 12, he will be larger than the Moon.
One of my favorite xkcd
https://xkcd.com/605/