The phrase 'multiply tenfold' is correct and usable in written English.
You could use it when describing something that has been multiplied by a factor of ten. For example, "The company's profits have multiplied tenfold since their new CEO took charge."
A chicken flock can multiply tenfold within a year.
But when the relationship has been troubled to begin with, the emotional wounds multiply tenfold.
The double whammy of global warming and a growing, ageing population will mean peoples' exposure to deadly heatwaves will multiply tenfold this century, according to a new report from the Royal Society.
Radiation levels in the capital did multiply tenfold during the past day, though they remain far below any dangerous level and almost immeasurably lower than at the burning plant.
Recognize the magic, miracles, and blessings that surround you and you can be sure that by doing so, they will multiply tenfold.
A recent unclassified Central Intelligence Agency report said China could respond by multiplying tenfold its number of long-range ballistic missiles.
Scar always remained at corner of mouth, giving effect of perennial smile Since then his receipts have multiplied tenfold.
One property, an apartment block on Linienstrasse in Berlin Mitte, gives an alarming vision of Berlin's future: its value has multiplied tenfold since 1997.
That was easy to do when housing prices here were surging so fast that some properties multiplied tenfold in value in just a few years.
In the following decade, however, the number of ETA killings by bombing and assassination multiplied tenfold compared to the occurrences under Franco's ironhanded repression.
In a published 1998 reminiscence, Zhang Shupan, a former party official in Henan, told of being castigated for questioning the preposterous official reports that grain yields had multiplied tenfold under Mao's inspiration.
