def calc(op,l,r)
  case op
  when '+' then l+r
  when '*' then l*r
  when '-' then l-r
  when '/' then l/r
  when '%' then l%r
  end
end

while gets do
  a = $_.scan(%r!\d+|[-+/*%]!)
  while a.length>1 do
    l, ope, r = a.shift(3)
    a.unshift calc(ope,l.to_i, r.to_i)
  end
  puts a[0]
end