sixfold

Having six times as much or as many.

Having six component parts.

The method is sixfold, and I will tell you what the six steps you must take are.

Times six, multiplied by six.

I will return your investment sixfold. That's right, you'll have 600% of what you started with. 1885, Alexander Campbell, Speeches on Divers Occasions, page 101, "[He] would state that in [1842, there were] 3,448 letters ... received, and in 1865 [that total was] 18,222, or nearly sixfold more.