When a laser is directed toward a plate with two slits that are $0\mathrm{.}3$mm $$apart$,$ the interference

fringes on a screen that is $1\mathrm{.}5$m $$away are $3\mathrm{.}2$mm $$apart$.$ If the entire apparatus $($laser$,$plate$,$ and

screen$)$is placed under water, how far apart will the interference fringes be$?$