
loop do

  a,op,b = gets.split(" ")

  a = a.to_i
  b = b.to_i

  case op
    when '+' then
      puts a + b
    when '-' then
      puts a - b
    when '*' then
      puts a * b
    when '/' then
      puts a / b
    when '?' then
      break
  end
   
end