Cases ofleukaemiain theareanear thenuclearreactorhaverisenby afactorof four.
Thecostofsilverhassurpassedthecostofgoldby afactorof two in the pastyear.
We'vemanagedtocutdownproductiontimeby afactorof four.
Therateat whichstarsareformedvariesby afactorof a million betweengalaxies.
We couldincreasethenumberofdosesto 75 million if wedilutethevaccineby afactorof five.