fun readInt () =
    valOf (TextIO.scanStream (Int.scan StringCvt.DEC) TextIO.stdIn)


fun intString n =
    if 0 <= n
    then Int.toString n
    else "-" ^ Int.toString (abs n)


val () =
    let
        val a = readInt ()
        val b = readInt ()

        val ans = if b mod a = 0 then (intString (b div a))
                  else "NO"
    in
        print (ans ^ "\n")
    end