import Data.List -- sort
import Control.Monad -- replicateM

readInt = read <$> getLine :: IO Integer
arrayInt = map read . words <$> getLine :: IO [Integer]
writeln x = putStrLn $ unwords x :: IO ()

main = do
    [a,b,t] <- arrayInt
    print $ (t `div` a) * b

eval a b = sum $ zipWith (\ x y -> if x == y then 0 else 1) a b
