program main
  implicit none
  integer::N,len,i,head,tail,res,num,op
  integer,parameter::add=1,mult=2
  character*100::S

  read '(a)',S
  res = 1
  op = mult
  head = 1
  tail = 1
  len = LEN_TRIM(S)

  do
     if(S(tail:tail).eq.'+'.or. &
        S(tail:tail).eq.'*') then
        read(S(head:tail-1),*) num

        if(op.eq.add) then
           res = num + res
        else
           res = num * res
        end if

        if(tail.eq.len+1) then
           exit
        else if(S(tail:tail).eq.'+') then
           op = mult
        else
           op = add
        end if

        head = tail + 1
        tail = tail + 1
     else if (tail.eq.len+1) then
        read(S(head:tail-1),*) num
        if(op.eq.add) then
           res = num + res
        else
           res = num * res
        end if
        exit
     else
        tail = tail + 1
     end if
  end do
  print '(i0)', res
end program main