import Control.Monad
import Control.Applicative
import Data.List
import qualified Data.Map as M
--import qualified Data.Vector as V
--import qualified Data.Vector.Mutable as VM

getBysplit = map read . words <$> getLine

main :: IO()
main = do
  [a, b, t] <- getBysplit
  let ans = (t `div` a) * b
  print ans
