"multiplied into" is an appropriate phrase to use in written English.
You can use this phrase to refer to the act of multiplying two or more numbers together. For example, "The two numbers were multiplied into six."
All told, the Jane Street business has multiplied into eight stands scattered across the city.
The one stained glass window used in the Stamford bar multiplied into dozens in Hamden.
In another tale he has multiplied into an entire Lakota Indian tribe.
The Montmartre animal had, by this point, divided, or multiplied, into six separate species.
What was once a single case has multiplied into four racially charged issues confronting Coke.
Recordings have multiplied into the dozens, on such labels as DG, BIS, and Naxos.
Interaction with antigens causes B cells to multiply into clones of immunoglobulin-secreting cells.
The features of Jerry Lewis, seen through the tiny facets of "fly-eye" plastic, multiply into a suitably manic mass of overlapping eyes, noses and mouths.
Almost everywhere you look in this bleak tale, there is evidence or suggestion of child abuse that multiplies into an ever-expanding matrix of dysfunction.
The patient may think she's better, but deep inside, those bugs are quietly multiplying into massive colonies (known in the trade as "pods") that burst out, Alien-style, at a later date to initiate another round of acute infection.
Her own works are experimental in method and visceral in impact: "Not I," a 2010 setting of Beckett, veers between guttural spluttering and otherworldly song, her voice multiplying into an electronic mob.
