module Main where
import Data.Ratio
  
solve :: [Integer] -> Rational
solve [] = 1
solve [x] = 1
solve (x:y:xs) = (fromInteger y % fromInteger x) * solve (y: xs)

formatRatio :: String -> String
formatRatio [] = []
formatRatio ('%':xs) = '/':formatRatio xs
formatRatio (x:xs) = x:formatRatio xs
                 
main :: IO()
main = do 
  n <- fmap read getLine  :: IO (Int)
  zs <- fmap words getLine :: IO [String]
  let zs' = fmap read zs :: [Integer]
  let res = show $ solve zs'
  putStrLn $ formatRatio res