import Control.Applicative ((<$>))
import Control.Monad
import Data.List

main :: IO ()
main = do
  solve <$> getl (map read . words) >>= print

solve :: [Int] -> Int
solve [d, p] = d * (100 + p) `div` 100

getl :: (String -> a) -> IO a
getl f = f <$> getLine